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359c286499
preallocate max. count of THDs puge might need at startup. Doing this at any other point of time is difficult, error prone
61 lines
2.0 KiB
Plaintext
61 lines
2.0 KiB
Plaintext
SELECT COUNT(@@GLOBAL.innodb_purge_threads);
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COUNT(@@GLOBAL.innodb_purge_threads)
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1
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1 Expected
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SELECT COUNT(@@innodb_purge_threads);
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COUNT(@@innodb_purge_threads)
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1
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1 Expected
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SET @save_threads = @@GLOBAL.innodb_purge_threads;
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SET @@GLOBAL.innodb_purge_threads=-1;
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Warnings:
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Warning 1292 Truncated incorrect innodb_purge_threads value: '-1'
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SELECT @@GLOBAL.innodb_purge_threads;
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@@GLOBAL.innodb_purge_threads
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1
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SET @@GLOBAL.innodb_purge_threads=0;
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Warnings:
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Warning 1292 Truncated incorrect innodb_purge_threads value: '0'
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SELECT @@GLOBAL.innodb_purge_threads;
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@@GLOBAL.innodb_purge_threads
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1
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SET @@GLOBAL.innodb_purge_threads=33;
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Warnings:
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Warning 1292 Truncated incorrect innodb_purge_threads value: '33'
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SELECT @@GLOBAL.innodb_purge_threads;
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@@GLOBAL.innodb_purge_threads
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32
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SET @@GLOBAL.innodb_purge_threads=1;
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SET @@GLOBAL.innodb_purge_threads=32;
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SELECT innodb_purge_threads = @@SESSION.innodb_purge_threads;
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ERROR 42S22: Unknown column 'innodb_purge_threads' in 'field list'
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Expected error 'Read-only variable'
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SELECT @@GLOBAL.innodb_purge_threads = VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='innodb_purge_threads';
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@@GLOBAL.innodb_purge_threads = VARIABLE_VALUE
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1
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1 Expected
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SELECT COUNT(VARIABLE_VALUE)
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME='innodb_purge_threads';
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COUNT(VARIABLE_VALUE)
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1
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1 Expected
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SELECT @@innodb_purge_threads = @@GLOBAL.innodb_purge_threads;
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@@innodb_purge_threads = @@GLOBAL.innodb_purge_threads
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1
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1 Expected
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SELECT COUNT(@@local.innodb_purge_threads);
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ERROR HY000: Variable 'innodb_purge_threads' is a GLOBAL variable
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Expected error 'Variable is a GLOBAL variable'
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SELECT COUNT(@@SESSION.innodb_purge_threads);
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ERROR HY000: Variable 'innodb_purge_threads' is a GLOBAL variable
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Expected error 'Variable is a GLOBAL variable'
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SELECT VARIABLE_NAME, VARIABLE_VALUE
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FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES
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WHERE VARIABLE_NAME = 'innodb_purge_threads';
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VARIABLE_NAME VARIABLE_VALUE
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INNODB_PURGE_THREADS 32
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SET GLOBAL innodb_purge_threads = @save_threads;
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