database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-08-08 11:22:35 +03:00
Code Activity

MDEV-26520 Make innodb_purge_threads dynamic

Browse Source 
preallocate max. count of THDs puge might need at startup.
Doing this at any other point of time is difficult, error prone
This commit is contained in:
Vladislav Vaintroub
2021-09-14 19:01:26 +02:00
parent 2255649939
commit 359c286499
5 changed files with 53 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
mysql-test/suite/sys_vars/r/innodb_purge_threads_basic.result
View File

@@ -6,9 +6,27 @@ SELECT COUNT(@@innodb_purge_threads);
COUNT(@@innodb_purge_threads)
1
1 Expected
SET @save_threads = @@GLOBAL.innodb_purge_threads;
SET @@GLOBAL.innodb_purge_threads=-1;
Warnings:
Warning 1292 Truncated incorrect innodb_purge_threads value: '-1'
SELECT @@GLOBAL.innodb_purge_threads;
@@GLOBAL.innodb_purge_threads
1
SET @@GLOBAL.innodb_purge_threads=0;
Warnings:
Warning 1292 Truncated incorrect innodb_purge_threads value: '0'
SELECT @@GLOBAL.innodb_purge_threads;
@@GLOBAL.innodb_purge_threads
1
SET @@GLOBAL.innodb_purge_threads=33;
Warnings:
Warning 1292 Truncated incorrect innodb_purge_threads value: '33'
SELECT @@GLOBAL.innodb_purge_threads;
@@GLOBAL.innodb_purge_threads
32
SET @@GLOBAL.innodb_purge_threads=1;
ERROR HY000: Variable 'innodb_purge_threads' is a read only variable
Expected error 'Read-only variable'
SET @@GLOBAL.innodb_purge_threads=32;
SELECT innodb_purge_threads = @@SESSION.innodb_purge_threads;
ERROR 42S22: Unknown column 'innodb_purge_threads' in 'field list'
Expected error 'Read-only variable'
@@ -38,4 +56,5 @@ SELECT VARIABLE_NAME, VARIABLE_VALUE
FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
WHERE VARIABLE_NAME = 'innodb_purge_threads';
VARIABLE_NAME VARIABLE_VALUE
INNODB_PURGE_THREADS 4
INNODB_PURGE_THREADS 32
SET GLOBAL innodb_purge_threads = @save_threads;