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MDEV-7901: re-implement analyze table for low impact

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Table before collecting engine independent statistics now is reopened in read mode,
InnoDB allow write operations in this case.
This commit is contained in:
Oleksandr Byelkin
2016-08-01 19:24:55 +02:00
parent ba4ed3ee84
commit 86975e0492
7 changed files with 285 additions and 135 deletions
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25
mysql-test/r/stat_tables_innodb_debug.result Normal file
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#
# MDEV-7901: re-implement analyze table for low impact
#
create table t1 (a int, b int, c int, key IDX1(a), key IDX2(a,b)) engine=innodb;
insert into t1 select seq/10, seq/2, seq from seq_0_to_9;
SET DEBUG_SYNC='statistics_collection_start1 SIGNAL analyzing WAIT_FOR written';
analyze table t1 persistent for all;
connect con1, localhost, root,,;
connection con1;
SET DEBUG_SYNC= 'now WAIT_FOR analyzing';
select count(*) from t1;
count(*)
10
insert into t1 values (333,333,333);
update t1 set a=1;
SET DEBUG_SYNC= 'now SIGNAL written';
connection default;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
select count(*) from t1;
count(*)
11
set debug_sync='RESET';
drop table t1;