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WL#2269 Enable query cache for NDB
- Added a thread that fetches commit_count for open tables. This will mean that NDB will not have to be contacted for every use of a cached query.
This commit is contained in:
msvensson@neptunus.homeip.net
193
mysql-test/r/ndb_cache2.result
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193
mysql-test/r/ndb_cache2.result
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drop table if exists t1;
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set GLOBAL query_cache_type=on;
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set GLOBAL query_cache_size=1355776;
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set GLOBAL ndb_cache_check_time=5;
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reset query cache;
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flush status;
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CREATE TABLE t1 ( pk int not null primary key,
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a int, b int not null, c varchar(20)) ENGINE=ndbcluster;
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insert into t1 value (1, 2, 3, 'First row');
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select * from t1;
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pk a b c
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1 2 3 First row
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 1
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 0
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select * from t1;
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pk a b c
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1 2 3 First row
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 1
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update t1 set a=3 where pk=1;
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select * from t1;
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pk a b c
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1 3 3 First row
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 2
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 1
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insert into t1 value (2, 7, 8, 'Second row');
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insert into t1 value (4, 5, 6, 'Fourth row');
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select * from t1;
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pk a b c
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2 7 8 Second row
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4 5 6 Fourth row
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1 3 3 First row
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 3
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 1
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select * from t1;
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pk a b c
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2 7 8 Second row
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4 5 6 Fourth row
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1 3 3 First row
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 2
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select * from t1 where b=3;
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pk a b c
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1 3 3 First row
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 2
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 2
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select * from t1 where b=3;
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pk a b c
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1 3 3 First row
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 3
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delete from t1 where c='Fourth row';
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select * from t1 where b=3;
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pk a b c
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1 3 3 First row
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 3
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use test;
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select * from t1;
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pk a b c
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2 7 8 Second row
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1 3 3 First row
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select * from t1 where b=3;
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pk a b c
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1 3 3 First row
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 4
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update t1 set a=4 where b=3;
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use test;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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select * from t1;
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pk a b c
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2 7 8 Second row
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1 4 3 First row
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select * from t1;
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pk a b c
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2 7 8 Second row
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1 4 3 First row
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 7
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 5
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select * from t1;
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pk a b c
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2 7 8 Second row
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1 4 3 First row
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select * from t1;
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pk a b c
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2 7 8 Second row
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1 4 3 First row
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 7
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 7
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begin;
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update t1 set a=5 where pk=1;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 7
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 7
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select * from t1;
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pk a b c
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2 7 8 Second row
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1 4 3 First row
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 8
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 7
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commit;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 8
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 7
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select * from t1;
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pk a b c
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2 7 8 Second row
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1 5 3 First row
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 9
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 7
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select * from t1;
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pk a b c
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2 7 8 Second row
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1 5 3 First row
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 1
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show status like "Qcache_inserts";
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Variable_name Value
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Qcache_inserts 9
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show status like "Qcache_hits";
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Variable_name Value
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Qcache_hits 8
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drop table t1;
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show status like "Qcache_queries_in_cache";
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Variable_name Value
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Qcache_queries_in_cache 0
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SET GLOBAL query_cache_size=0;
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SET GLOBAL ndb_cache_check_time=0;
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