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MDEV-28540 Deprecate and ignore the parameter innodb_prefix_index_cluster_optimization
The parameter innodb_prefix_index_cluster_optimization used to enable an
optimization that was added in cb37c55768
and was disabled by default.
We will unconditionally enable the extension and mark the parameter
as deprecated.
Related to this, the counters
Innodb_secondary_index_triggered_cluster_reads and
Innodb_secondary_index_triggered_cluster_reads_avoided
allowed to determine the usefulness of this optimization.
Now that the configuration parameter is disabled, the counters
do not serve any useful purpose and can be removed.
row_search_with_covering_prefix(): Fix a bug that caused an
incorrect result to be returned.
This commit is contained in:
Marko Mäkelä
@ -1,8 +1,3 @@
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SET @save_opt= @@GLOBAL.innodb_prefix_index_cluster_optimization;
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set global innodb_prefix_index_cluster_optimization = ON;
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show variables like 'innodb_prefix_index_cluster_optimization';
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Variable_name Value
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innodb_prefix_index_cluster_optimization ON
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SET @save_innodb_stats_persistent=@@GLOBAL.innodb_stats_persistent;
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SET GLOBAL innodb_stats_persistent = OFF;
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# Create a table with a large varchar field that we index the prefix
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@ -31,110 +26,39 @@ id fake_id bigfield
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32 1032 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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33 1033 yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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128 1128 zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
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# Baseline sanity check: 0, 0.
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select "no-op query";
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no-op query
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no-op query
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible for optimization.
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select id, bigfield from prefixinno where bigfield = repeat('d', 31);
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id bigfield
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31 ddddddddddddddddddddddddddddddd
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible for optimization, access via fake_id only.
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select id, bigfield from prefixinno where fake_id = 1031;
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id bigfield
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31 ddddddddddddddddddddddddddddddd
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible for optimization, access via fake_id of big row.
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select id, bigfield from prefixinno where fake_id = 1033;
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id bigfield
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33 yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible for optimization.
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select id, bigfield from prefixinno where bigfield = repeat('x', 32);
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id bigfield
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32 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible for optimization.
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select id, bigfield from prefixinno where bigfield = repeat('y', 33);
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id bigfield
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33 yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible, should not increment lookup counter.
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select id, bigfield from prefixinno where bigfield = repeat('b', 8);
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id bigfield
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8 bbbbbbbb
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible, should not increment lookup counter.
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select id, bigfield from prefixinno where bigfield = repeat('c', 24);
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id bigfield
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24 cccccccccccccccccccccccc
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Should increment lookup counter.
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select id, bigfield from prefixinno where bigfield = repeat('z', 128);
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id bigfield
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128 zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Disable optimization, confirm we still increment counter.
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set global innodb_prefix_index_cluster_optimization = OFF;
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select id, bigfield from prefixinno where fake_id = 1033;
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id bigfield
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33 yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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drop table prefixinno;
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# Multi-byte handling case
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set global innodb_prefix_index_cluster_optimization = ON;
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SET NAMES utf8mb4;
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CREATE TABLE t1(
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f1 varchar(10) CHARACTER SET UTF8MB4 COLLATE UTF8MB4_BIN,
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@ -146,113 +70,47 @@ INSERT INTO t1 VALUES('😊me'), ('eu€'), ('ls¢');
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'a';
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f1
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a
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'c%';
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f1
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cccc
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cčc
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select @cluster_lookups;
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@cluster_lookups
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3
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'až';
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f1
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až
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'தமிழ்';
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f1
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தமிழ்
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'ggᵷ%';
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f1
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ggᵷg
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '😊%';
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f1
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😊me
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'ls¢';
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f1
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ls¢
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '¢¢%';
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f1
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¢¢
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🐱🌑%';
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f1
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🐱🌑
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌑%';
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f1
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🌑
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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2
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌒%';
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f1
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🌒
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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2
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DROP TABLE t1;
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# Multi-byte with minimum character length > 1 bytes
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CREATE TABLE t1(
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@ -265,113 +123,47 @@ INSERT INTO t1 VALUES('😊me'), ('eu€'), ('ls¢');
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'a';
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f1
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a
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'c%';
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f1
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cccc
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cčc
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select @cluster_lookups;
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@cluster_lookups
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3
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'až';
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f1
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až
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'தமிழ்';
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f1
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தமிழ்
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'ggᵷ%';
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f1
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ggᵷg
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select @cluster_lookups;
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@cluster_lookups
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2
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '😊%';
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f1
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😊me
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'ls¢';
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f1
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ls¢
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX(`f1`) WHERE f1 like '¢¢%';
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f1
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¢¢
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🐱🌑%';
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f1
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🐱🌑
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible - record length is shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌑%';
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f1
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🌑
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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2
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# Eligible - record length is shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌒%';
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f1
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🌒
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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2
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DROP TABLE t1;
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CREATE TABLE t1(
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col1 INT,
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@ -383,22 +175,10 @@ INSERT INTO t1(col1) VALUES(1);
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SELECT col1 FROM t1 FORCE INDEX (`idx1`) WHERE col2 is NULL;
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col1
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1
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix index
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SELECT col1 FROM t1 FORCE INDEX (`idx1`) WHERE col2 like 'test1%';
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col1
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3
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select @cluster_lookups;
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@cluster_lookups
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2
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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DROP TABLE t1;
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#
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# MDEV-20464 Division by 0 in row_search_with_covering_prefix()
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@ -443,18 +223,10 @@ INSERT INTO wp_blogs (domain, path) VALUES
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('domain.no', '/fondsinvesteringer/'), ('domain.no', '/'),
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('foo', 'bar'), ('bar', 'foo'), ('foo', 'foo'), ('bar', 'bar'),
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('foo', 'foobar'), ('bar', 'foobar'), ('foobar', 'foobar');
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SET GLOBAL innodb_prefix_index_cluster_optimization=off;
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SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
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AND path IN ( '/fondsinvesteringer/', '/' );
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blog_id
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2
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1
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SET GLOBAL innodb_prefix_index_cluster_optimization=on;
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SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
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AND path IN ( '/fondsinvesteringer/', '/' );
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blog_id
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2
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1
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DROP TABLE wp_blogs;
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SET GLOBAL innodb_prefix_index_cluster_optimization = @save_opt;
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SET GLOBAL innodb_stats_persistent = @save_innodb_stats_persistent;
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@ -1,9 +1,5 @@
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-- source include/have_innodb.inc
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SET @save_opt= @@GLOBAL.innodb_prefix_index_cluster_optimization;
|
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set global innodb_prefix_index_cluster_optimization = ON;
|
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show variables like 'innodb_prefix_index_cluster_optimization';
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SET @save_innodb_stats_persistent=@@GLOBAL.innodb_stats_persistent;
|
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SET GLOBAL innodb_stats_persistent = OFF;
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@ -28,185 +24,28 @@ insert into prefixinno values (1, 1001, repeat('a', 1)),
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select * from prefixinno;
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let $show_count_statement = show status like 'innodb_secondary_index_triggered_cluster_reads';
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let $show_opt_statement = show status like 'innodb_secondary_index_triggered_cluster_reads_avoided';
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--echo # Baseline sanity check: 0, 0.
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let $base_count = query_get_value($show_count_statement, Value, 1);
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let $base_opt = query_get_value($show_opt_statement, Value, 1);
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select "no-op query";
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|
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let $count = query_get_value($show_count_statement, Value, 1);
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let $opt = query_get_value($show_opt_statement, Value, 1);
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--disable_query_log
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eval select $count - $base_count into @cluster_lookups;
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eval select $opt - $base_opt into @cluster_lookups_avoided;
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--enable_query_log
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select @cluster_lookups;
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select @cluster_lookups_avoided;
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--echo # Eligible for optimization.
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let $base_count = query_get_value($show_count_statement, Value, 1);
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let $base_opt = query_get_value($show_opt_statement, Value, 1);
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|
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select id, bigfield from prefixinno where bigfield = repeat('d', 31);
|
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|
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let $count = query_get_value($show_count_statement, Value, 1);
|
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let $opt = query_get_value($show_opt_statement, Value, 1);
|
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|
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--disable_query_log
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eval select $count - $base_count into @cluster_lookups;
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eval select $opt - $base_opt into @cluster_lookups_avoided;
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--enable_query_log
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|
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select @cluster_lookups;
|
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select @cluster_lookups_avoided;
|
||||
|
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--echo # Eligible for optimization, access via fake_id only.
|
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let $base_count = query_get_value($show_count_statement, Value, 1);
|
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let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
select id, bigfield from prefixinno where fake_id = 1031;
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
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eval select $count - $base_count into @cluster_lookups;
|
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eval select $opt - $base_opt into @cluster_lookups_avoided;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible for optimization, access via fake_id of big row.
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
select id, bigfield from prefixinno where fake_id = 1033;
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval select $count - $base_count into @cluster_lookups;
|
||||
eval select $opt - $base_opt into @cluster_lookups_avoided;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible for optimization.
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
select id, bigfield from prefixinno where bigfield = repeat('x', 32);
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval select $count - $base_count into @cluster_lookups;
|
||||
eval select $opt - $base_opt into @cluster_lookups_avoided;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible for optimization.
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
select id, bigfield from prefixinno where bigfield = repeat('y', 33);
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval select $count - $base_count into @cluster_lookups;
|
||||
eval select $opt - $base_opt into @cluster_lookups_avoided;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible, should not increment lookup counter.
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
select id, bigfield from prefixinno where bigfield = repeat('b', 8);
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval select $count - $base_count into @cluster_lookups;
|
||||
eval select $opt - $base_opt into @cluster_lookups_avoided;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible, should not increment lookup counter.
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
select id, bigfield from prefixinno where bigfield = repeat('c', 24);
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval select $count - $base_count into @cluster_lookups;
|
||||
eval select $opt - $base_opt into @cluster_lookups_avoided;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Should increment lookup counter.
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
select id, bigfield from prefixinno where bigfield = repeat('z', 128);
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval select $count - $base_count into @cluster_lookups;
|
||||
eval select $opt - $base_opt into @cluster_lookups_avoided;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Disable optimization, confirm we still increment counter.
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
set global innodb_prefix_index_cluster_optimization = OFF;
|
||||
select id, bigfield from prefixinno where fake_id = 1033;
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval select $count - $base_count into @cluster_lookups;
|
||||
eval select $opt - $base_opt into @cluster_lookups_avoided;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
drop table prefixinno;
|
||||
|
||||
--echo # Multi-byte handling case
|
||||
|
||||
set global innodb_prefix_index_cluster_optimization = ON;
|
||||
SET NAMES utf8mb4;
|
||||
CREATE TABLE t1(
|
||||
f1 varchar(10) CHARACTER SET UTF8MB4 COLLATE UTF8MB4_BIN,
|
||||
@ -217,200 +56,38 @@ INSERT INTO t1 VALUES('தமிழ்'), ('🐱🌑'), ('🌒'), ('🌑');
|
||||
INSERT INTO t1 VALUES('😊me'), ('eu€'), ('ls¢');
|
||||
|
||||
--echo # Eligible - record length is shorter than prefix
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'a';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'c%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible - record length shorter than prefix length
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'až';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'தமிழ்';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'ggᵷ%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '😊%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'ls¢';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible - record length shorter than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '¢¢%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible - record length shorter than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🐱🌑%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌑%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌒%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
DROP TABLE t1;
|
||||
|
||||
--echo # Multi-byte with minimum character length > 1 bytes
|
||||
@ -424,201 +101,38 @@ INSERT INTO t1 VALUES('தமிழ்'), ('🐱🌑'), ('🌒'), ('🌑');
|
||||
INSERT INTO t1 VALUES('😊me'), ('eu€'), ('ls¢');
|
||||
|
||||
--echo # Eligible - record length is shorter than prefix
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'a';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'c%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible - record length shorter than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'až';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'தமிழ்';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'ggᵷ%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '😊%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'ls¢';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible - record length shorter than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX(`f1`) WHERE f1 like '¢¢%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible - record length shorter than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🐱🌑%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible - record length is shorter than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌑%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Eligible - record length is shorter than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌒%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
DROP TABLE t1;
|
||||
|
||||
CREATE TABLE t1(
|
||||
@ -629,41 +143,11 @@ INSERT INTO t1 VALUES (2, 'test'), (3, repeat('test1', 2000));
|
||||
INSERT INTO t1(col1) VALUES(1);
|
||||
|
||||
--echo # Eligible - record length is shorter than prefix length
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT col1 FROM t1 FORCE INDEX (`idx1`) WHERE col2 is NULL;
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
--echo # Not eligible - record length longer than prefix index
|
||||
|
||||
let $base_count = query_get_value($show_count_statement, Value, 1);
|
||||
let $base_opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
SELECT col1 FROM t1 FORCE INDEX (`idx1`) WHERE col2 like 'test1%';
|
||||
|
||||
let $count = query_get_value($show_count_statement, Value, 1);
|
||||
let $opt = query_get_value($show_opt_statement, Value, 1);
|
||||
|
||||
--disable_query_log
|
||||
eval set @cluster_lookups = $count - $base_count;
|
||||
eval set @cluster_lookups_avoided = $opt - $base_opt;
|
||||
--enable_query_log
|
||||
|
||||
select @cluster_lookups;
|
||||
select @cluster_lookups_avoided;
|
||||
|
||||
DROP TABLE t1;
|
||||
|
||||
--echo #
|
||||
@ -709,15 +193,9 @@ INSERT INTO wp_blogs (domain, path) VALUES
|
||||
('foo', 'bar'), ('bar', 'foo'), ('foo', 'foo'), ('bar', 'bar'),
|
||||
('foo', 'foobar'), ('bar', 'foobar'), ('foobar', 'foobar');
|
||||
|
||||
SET GLOBAL innodb_prefix_index_cluster_optimization=off;
|
||||
SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
|
||||
AND path IN ( '/fondsinvesteringer/', '/' );
|
||||
|
||||
SET GLOBAL innodb_prefix_index_cluster_optimization=on;
|
||||
SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
|
||||
AND path IN ( '/fondsinvesteringer/', '/' );
|
||||
|
||||
DROP TABLE wp_blogs;
|
||||
|
||||
SET GLOBAL innodb_prefix_index_cluster_optimization = @save_opt;
|
||||
SET GLOBAL innodb_stats_persistent = @save_innodb_stats_persistent;
|
||||
|
||||
@ -70,8 +70,6 @@ buffer_pool_pages_free buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL N
|
||||
buffer_pages_created buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of pages created (innodb_pages_created)
|
||||
buffer_pages_written buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of pages written (innodb_pages_written)
|
||||
buffer_pages_read buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of pages read (innodb_pages_read)
|
||||
buffer_index_sec_rec_cluster_reads buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of secondary record reads triggered cluster read
|
||||
buffer_index_sec_rec_cluster_reads_avoided buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of secondary record reads avoided triggering cluster read
|
||||
buffer_data_reads buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Amount of data read in bytes (innodb_data_reads)
|
||||
buffer_data_written buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Amount of data written in bytes (innodb_data_written)
|
||||
buffer_flush_batch_scanned buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 set_owner Total pages scanned as part of flush batch
|
||||
|
||||
@ -98,8 +98,6 @@ INNODB_INSTANT_ALTER_COLUMN
|
||||
INNODB_ONLINEDDL_ROWLOG_ROWS
|
||||
INNODB_ONLINEDDL_ROWLOG_PCT_USED
|
||||
INNODB_ONLINEDDL_PCT_PROGRESS
|
||||
INNODB_SECONDARY_INDEX_TRIGGERED_CLUSTER_READS
|
||||
INNODB_SECONDARY_INDEX_TRIGGERED_CLUSTER_READS_AVOIDED
|
||||
INNODB_ENCRYPTION_ROTATION_PAGES_READ_FROM_CACHE
|
||||
INNODB_ENCRYPTION_ROTATION_PAGES_READ_FROM_DISK
|
||||
INNODB_ENCRYPTION_ROTATION_PAGES_MODIFIED
|
||||
|
||||
@ -36,8 +36,6 @@ buffer_pool_pages_free disabled
|
||||
buffer_pages_created disabled
|
||||
buffer_pages_written disabled
|
||||
buffer_pages_read disabled
|
||||
buffer_index_sec_rec_cluster_reads disabled
|
||||
buffer_index_sec_rec_cluster_reads_avoided disabled
|
||||
buffer_data_reads disabled
|
||||
buffer_data_written disabled
|
||||
buffer_flush_batch_scanned disabled
|
||||
|
||||
@ -1,122 +0,0 @@
|
||||
SET @start_global_value = @@global.innodb_prefix_index_cluster_optimization;
|
||||
SELECT @start_global_value;
|
||||
@start_global_value
|
||||
0
|
||||
#
|
||||
# exists as global only
|
||||
#
|
||||
Valid values are 'ON' and 'OFF'
|
||||
select @@global.innodb_prefix_index_cluster_optimization in (0, 1);
|
||||
@@global.innodb_prefix_index_cluster_optimization in (0, 1)
|
||||
1
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
0
|
||||
select @@session.innodb_prefix_index_cluster_optimization;
|
||||
ERROR HY000: Variable 'innodb_prefix_index_cluster_optimization' is a GLOBAL variable
|
||||
show global variables like 'innodb_prefix_index_cluster_optimization';
|
||||
Variable_name Value
|
||||
innodb_prefix_index_cluster_optimization OFF
|
||||
show session variables like 'innodb_prefix_index_cluster_optimization';
|
||||
Variable_name Value
|
||||
innodb_prefix_index_cluster_optimization OFF
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
|
||||
#
|
||||
# show that it's writable
|
||||
#
|
||||
set global innodb_prefix_index_cluster_optimization = 'OFF';
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
0
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
|
||||
set @@global.innodb_prefix_index_cluster_optimization = 'ON';
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
1
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
set global innodb_prefix_index_cluster_optimization = 0;
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
0
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION OFF
|
||||
set @@global.innodb_prefix_index_cluster_optimization = 1;
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
1
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
set session innodb_prefix_index_cluster_optimization = 'OFF';
|
||||
ERROR HY000: Variable 'innodb_prefix_index_cluster_optimization' is a GLOBAL variable and should be set with SET GLOBAL
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
1
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
set @@session.innodb_prefix_index_cluster_optimization = 'ON';
|
||||
ERROR HY000: Variable 'innodb_prefix_index_cluster_optimization' is a GLOBAL variable and should be set with SET GLOBAL
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
1
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
#
|
||||
# incorrect types
|
||||
#
|
||||
set global innodb_prefix_index_cluster_optimization = 1.1;
|
||||
ERROR 42000: Incorrect argument type to variable 'innodb_prefix_index_cluster_optimization'
|
||||
set global innodb_prefix_index_cluster_optimization = 1e1;
|
||||
ERROR 42000: Incorrect argument type to variable 'innodb_prefix_index_cluster_optimization'
|
||||
set global innodb_prefix_index_cluster_optimization = 2;
|
||||
ERROR 42000: Variable 'innodb_prefix_index_cluster_optimization' can't be set to the value of '2'
|
||||
set global innodb_prefix_index_cluster_optimization = -3;
|
||||
ERROR 42000: Variable 'innodb_prefix_index_cluster_optimization' can't be set to the value of '-3'
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
1
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
VARIABLE_NAME VARIABLE_VALUE
|
||||
INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION ON
|
||||
set global innodb_prefix_index_cluster_optimization = 'AUTO';
|
||||
ERROR 42000: Variable 'innodb_prefix_index_cluster_optimization' can't be set to the value of 'AUTO'
|
||||
#
|
||||
# Cleanup
|
||||
#
|
||||
SET @@global.innodb_prefix_index_cluster_optimization = @start_global_value;
|
||||
SELECT @@global.innodb_prefix_index_cluster_optimization;
|
||||
@@global.innodb_prefix_index_cluster_optimization
|
||||
0
|
||||
@ -1256,10 +1256,10 @@ READ_ONLY YES
|
||||
COMMAND_LINE_ARGUMENT OPTIONAL
|
||||
VARIABLE_NAME INNODB_PREFIX_INDEX_CLUSTER_OPTIMIZATION
|
||||
SESSION_VALUE NULL
|
||||
DEFAULT_VALUE OFF
|
||||
DEFAULT_VALUE ON
|
||||
VARIABLE_SCOPE GLOBAL
|
||||
VARIABLE_TYPE BOOLEAN
|
||||
VARIABLE_COMMENT Enable prefix optimization to sometimes avoid cluster index lookups.
|
||||
VARIABLE_COMMENT Deprecated parameter with no effect
|
||||
NUMERIC_MIN_VALUE NULL
|
||||
NUMERIC_MAX_VALUE NULL
|
||||
NUMERIC_BLOCK_SIZE NULL
|
||||
|
||||
@ -1,76 +0,0 @@
|
||||
--source include/have_innodb.inc
|
||||
|
||||
SET @start_global_value = @@global.innodb_prefix_index_cluster_optimization;
|
||||
SELECT @start_global_value;
|
||||
|
||||
--echo #
|
||||
--echo # exists as global only
|
||||
--echo #
|
||||
|
||||
--echo Valid values are 'ON' and 'OFF'
|
||||
select @@global.innodb_prefix_index_cluster_optimization in (0, 1);
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
|
||||
select @@session.innodb_prefix_index_cluster_optimization;
|
||||
show global variables like 'innodb_prefix_index_cluster_optimization';
|
||||
show session variables like 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
|
||||
--echo #
|
||||
--echo # show that it's writable
|
||||
--echo #
|
||||
|
||||
set global innodb_prefix_index_cluster_optimization = 'OFF';
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
set @@global.innodb_prefix_index_cluster_optimization = 'ON';
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
set global innodb_prefix_index_cluster_optimization = 0;
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
set @@global.innodb_prefix_index_cluster_optimization = 1;
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
|
||||
--error ER_GLOBAL_VARIABLE
|
||||
set session innodb_prefix_index_cluster_optimization = 'OFF';
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
|
||||
--error ER_GLOBAL_VARIABLE
|
||||
set @@session.innodb_prefix_index_cluster_optimization = 'ON';
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
|
||||
--echo #
|
||||
--echo # incorrect types
|
||||
--echo #
|
||||
|
||||
--error ER_WRONG_TYPE_FOR_VAR
|
||||
set global innodb_prefix_index_cluster_optimization = 1.1;
|
||||
--error ER_WRONG_TYPE_FOR_VAR
|
||||
set global innodb_prefix_index_cluster_optimization = 1e1;
|
||||
--error ER_WRONG_VALUE_FOR_VAR
|
||||
set global innodb_prefix_index_cluster_optimization = 2;
|
||||
--error ER_WRONG_VALUE_FOR_VAR
|
||||
set global innodb_prefix_index_cluster_optimization = -3;
|
||||
select @@global.innodb_prefix_index_cluster_optimization;
|
||||
select * from information_schema.global_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
select * from information_schema.session_variables where variable_name = 'innodb_prefix_index_cluster_optimization';
|
||||
--error ER_WRONG_VALUE_FOR_VAR
|
||||
set global innodb_prefix_index_cluster_optimization = 'AUTO';
|
||||
|
||||
--echo #
|
||||
--echo # Cleanup
|
||||
--echo #
|
||||
|
||||
SET @@global.innodb_prefix_index_cluster_optimization = @start_global_value;
|
||||
SELECT @@global.innodb_prefix_index_cluster_optimization;
|
||||
@ -1052,13 +1052,6 @@ static SHOW_VAR innodb_status_variables[]= {
|
||||
{"onlineddl_pct_progress",
|
||||
&export_vars.innodb_onlineddl_pct_progress, SHOW_SIZE_T},
|
||||
|
||||
/* Times secondary index lookup triggered cluster lookup and
|
||||
times prefix optimization avoided triggering cluster lookup */
|
||||
{"secondary_index_triggered_cluster_reads",
|
||||
&export_vars.innodb_sec_rec_cluster_reads, SHOW_SIZE_T},
|
||||
{"secondary_index_triggered_cluster_reads_avoided",
|
||||
&export_vars.innodb_sec_rec_cluster_reads_avoided, SHOW_SIZE_T},
|
||||
|
||||
/* Encryption */
|
||||
{"encryption_rotation_pages_read_from_cache",
|
||||
&export_vars.innodb_encryption_rotation_pages_read_from_cache, SHOW_SIZE_T},
|
||||
@ -19349,11 +19342,13 @@ static MYSQL_SYSVAR_UINT(spin_wait_delay, srv_spin_wait_delay,
|
||||
"Maximum delay between polling for a spin lock (4 by default)",
|
||||
NULL, NULL, 4, 0, 6000, 0);
|
||||
|
||||
static my_bool innodb_prefix_index_cluster_optimization;
|
||||
|
||||
static MYSQL_SYSVAR_BOOL(prefix_index_cluster_optimization,
|
||||
srv_prefix_index_cluster_optimization,
|
||||
PLUGIN_VAR_OPCMDARG,
|
||||
"Enable prefix optimization to sometimes avoid cluster index lookups.",
|
||||
NULL, NULL, FALSE);
|
||||
innodb_prefix_index_cluster_optimization,
|
||||
PLUGIN_VAR_OPCMDARG | PLUGIN_VAR_DEPRECATED,
|
||||
"Deprecated parameter with no effect",
|
||||
nullptr, nullptr, TRUE);
|
||||
|
||||
static MYSQL_SYSVAR_STR(data_file_path, innobase_data_file_path,
|
||||
PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
|
||||
|
||||
@ -175,8 +175,6 @@ enum monitor_id_t {
|
||||
MONITOR_OVLD_PAGE_CREATED,
|
||||
MONITOR_OVLD_PAGES_WRITTEN,
|
||||
MONITOR_OVLD_PAGES_READ,
|
||||
MONITOR_OVLD_INDEX_SEC_REC_CLUSTER_READS,
|
||||
MONITOR_OVLD_INDEX_SEC_REC_CLUSTER_READS_AVOIDED,
|
||||
MONITOR_OVLD_BYTE_READ,
|
||||
MONITOR_OVLD_BYTE_WRITTEN,
|
||||
MONITOR_FLUSH_BATCH_SCANNED,
|
||||
|
||||
@ -116,12 +116,6 @@ struct srv_stats_t
|
||||
/** Number of data read in total (in bytes) */
|
||||
ulint_ctr_1_t data_read;
|
||||
|
||||
/** Number of times secondary index lookup triggered cluster lookup */
|
||||
ulint_ctr_n_t n_sec_rec_cluster_reads;
|
||||
|
||||
/** Number of times prefix optimization avoided triggering cluster lookup */
|
||||
ulint_ctr_n_t n_sec_rec_cluster_reads_avoided;
|
||||
|
||||
/** Number of encryption_get_latest_key_version calls */
|
||||
ulint_ctr_n_t n_key_requests;
|
||||
|
||||
@ -227,10 +221,6 @@ extern ulong srv_purge_rseg_truncate_frequency;
|
||||
/** Enable or Disable Truncate of UNDO tablespace. */
|
||||
extern my_bool srv_undo_log_truncate;
|
||||
|
||||
/* Optimize prefix index queries to skip cluster index lookup when possible */
|
||||
/* Enables or disables this prefix optimization. Disabled by default. */
|
||||
extern my_bool srv_prefix_index_cluster_optimization;
|
||||
|
||||
/** Default size of UNDO tablespace (10MiB for innodb_page_size=16k) */
|
||||
constexpr ulint SRV_UNDO_TABLESPACE_SIZE_IN_PAGES= (10U << 20) /
|
||||
UNIV_PAGE_SIZE_DEF;
|
||||
@ -727,9 +717,6 @@ struct export_var_t{
|
||||
/* Number of temporary tablespace pages decrypted */
|
||||
ib_int64_t innodb_n_temp_blocks_decrypted;
|
||||
|
||||
ulint innodb_sec_rec_cluster_reads; /*!< srv_sec_rec_cluster_reads */
|
||||
ulint innodb_sec_rec_cluster_reads_avoided;/*!< srv_sec_rec_cluster_reads_avoided */
|
||||
|
||||
ulint innodb_encryption_rotation_pages_read_from_cache;
|
||||
ulint innodb_encryption_rotation_pages_read_from_disk;
|
||||
ulint innodb_encryption_rotation_pages_modified;
|
||||
|
||||
@ -3337,9 +3337,6 @@ Row_sel_get_clust_rec_for_mysql::operator()(
|
||||
*out_rec = NULL;
|
||||
trx = thr_get_trx(thr);
|
||||
|
||||
srv_stats.n_sec_rec_cluster_reads.inc(
|
||||
thd_get_thread_id(trx->mysql_thd));
|
||||
|
||||
row_build_row_ref_in_tuple(prebuilt->clust_ref, rec,
|
||||
sec_index, *offsets);
|
||||
|
||||
@ -4205,11 +4202,9 @@ bool row_search_with_covering_prefix(
|
||||
const dict_index_t* index = prebuilt->index;
|
||||
ut_ad(!dict_index_is_clust(index));
|
||||
|
||||
if (dict_index_is_spatial(index)) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (!srv_prefix_index_cluster_optimization) {
|
||||
/* In ha_innobase::build_template() we choose to access the
|
||||
whole row when using exclusive row locks. */
|
||||
if (prebuilt->select_lock_type == LOCK_X || !index->is_btree()) {
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -4276,7 +4271,6 @@ bool row_search_with_covering_prefix(
|
||||
ut_a(templ->rec_field_no != ULINT_UNDEFINED);
|
||||
}
|
||||
|
||||
srv_stats.n_sec_rec_cluster_reads_avoided.inc();
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
@ -278,18 +278,6 @@ static monitor_info_t innodb_counter_info[] =
|
||||
MONITOR_EXISTING | MONITOR_DEFAULT_ON),
|
||||
MONITOR_DEFAULT_START, MONITOR_OVLD_PAGES_READ},
|
||||
|
||||
{"buffer_index_sec_rec_cluster_reads", "buffer",
|
||||
"Number of secondary record reads triggered cluster read",
|
||||
static_cast<monitor_type_t>(
|
||||
MONITOR_EXISTING | MONITOR_DEFAULT_ON),
|
||||
MONITOR_DEFAULT_START, MONITOR_OVLD_INDEX_SEC_REC_CLUSTER_READS},
|
||||
|
||||
{"buffer_index_sec_rec_cluster_reads_avoided", "buffer",
|
||||
"Number of secondary record reads avoided triggering cluster read",
|
||||
static_cast<monitor_type_t>(
|
||||
MONITOR_EXISTING | MONITOR_DEFAULT_ON),
|
||||
MONITOR_DEFAULT_START, MONITOR_OVLD_INDEX_SEC_REC_CLUSTER_READS_AVOIDED},
|
||||
|
||||
{"buffer_data_reads", "buffer",
|
||||
"Amount of data read in bytes (innodb_data_reads)",
|
||||
static_cast<monitor_type_t>(
|
||||
@ -1425,16 +1413,6 @@ srv_mon_process_existing_counter(
|
||||
value = buf_pool.stat.n_pages_read;
|
||||
break;
|
||||
|
||||
/* Number of times secondary index lookup triggered cluster lookup */
|
||||
case MONITOR_OVLD_INDEX_SEC_REC_CLUSTER_READS:
|
||||
value = srv_stats.n_sec_rec_cluster_reads;
|
||||
break;
|
||||
/* Number of times prefix optimization avoided triggering cluster
|
||||
lookup */
|
||||
case MONITOR_OVLD_INDEX_SEC_REC_CLUSTER_READS_AVOIDED:
|
||||
value = srv_stats.n_sec_rec_cluster_reads_avoided;
|
||||
break;
|
||||
|
||||
/* innodb_data_reads, the total number of data reads */
|
||||
case MONITOR_OVLD_BYTE_READ:
|
||||
value = srv_stats.data_read;
|
||||
|
||||
@ -291,10 +291,6 @@ uint srv_fast_shutdown;
|
||||
/** copy of innodb_status_file; generate a innodb_status.<pid> file */
|
||||
ibool srv_innodb_status;
|
||||
|
||||
/** innodb_prefix_index_cluster_optimization; whether to optimize
|
||||
prefix index queries to skip cluster index lookup when possible */
|
||||
my_bool srv_prefix_index_cluster_optimization;
|
||||
|
||||
/** innodb_stats_transient_sample_pages;
|
||||
When estimating number of different key values in an index, sample
|
||||
this many index pages, there are 2 ways to calculate statistics:
|
||||
@ -1031,11 +1027,6 @@ srv_export_innodb_status(void)
|
||||
export_vars.innodb_onlineddl_rowlog_pct_used = onlineddl_rowlog_pct_used;
|
||||
export_vars.innodb_onlineddl_pct_progress = onlineddl_pct_progress;
|
||||
|
||||
export_vars.innodb_sec_rec_cluster_reads =
|
||||
srv_stats.n_sec_rec_cluster_reads;
|
||||
export_vars.innodb_sec_rec_cluster_reads_avoided =
|
||||
srv_stats.n_sec_rec_cluster_reads_avoided;
|
||||
|
||||
if (!srv_read_only_mode) {
|
||||
export_vars.innodb_encryption_rotation_pages_read_from_cache =
|
||||
crypt_stat.pages_read_from_cache;
|
||||
|
||||
@ -52,8 +52,6 @@ buffer_pool_pages_free buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL N
|
||||
buffer_pages_created buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of pages created (innodb_pages_created)
|
||||
buffer_pages_written buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of pages written (innodb_pages_written)
|
||||
buffer_pages_read buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of pages read (innodb_pages_read)
|
||||
buffer_index_sec_rec_cluster_reads buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of secondary record reads triggered cluster read
|
||||
buffer_index_sec_rec_cluster_reads_avoided buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Number of secondary record reads avoided triggering cluster read
|
||||
buffer_data_reads buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Amount of data read in bytes (innodb_data_reads)
|
||||
buffer_data_written buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 status_counter Amount of data written in bytes (innodb_data_written)
|
||||
buffer_flush_batch_scanned buffer 0 NULL NULL NULL 0 NULL NULL NULL NULL NULL NULL NULL 0 set_owner Total pages scanned as part of flush batch
|
||||
|
||||
Reference in New Issue
Block a user