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1756b0f37d
Let us integrate the test case with innodb.page_cleaner so that there will be less interference from log writes due to checkpoints. Also, make the test compatible with ./mtr --cursor-protocol.
37 lines
1.6 KiB
Text
37 lines
1.6 KiB
Text
SET @save_pct= @@GLOBAL.innodb_max_dirty_pages_pct;
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SET @save_pct_lwm= @@GLOBAL.innodb_max_dirty_pages_pct_lwm;
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SET GLOBAL innodb_max_dirty_pages_pct_lwm=0.0;
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SET GLOBAL innodb_max_dirty_pages_pct=0.0;
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CREATE TABLE t(a INT PRIMARY KEY) ENGINE=InnoDB STATS_PERSISTENT=0;
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connect prevent_purge,localhost,root;
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START TRANSACTION WITH CONSISTENT SNAPSHOT;
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connection default;
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SET GLOBAL innodb_max_purge_lag_wait=0;
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SET GLOBAL innodb_max_dirty_pages_pct=90.0;
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SELECT variable_value INTO @log_writes FROM information_schema.global_status
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WHERE variable_name='innodb_log_writes';
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BEGIN;
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INSERT INTO t SELECT * FROM seq_1_to_500;
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INSERT INTO t SELECT * FROM seq_501_to_1000;
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INSERT INTO t SELECT * FROM seq_1001_to_1500;
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INSERT INTO t SELECT * FROM seq_1501_to_2000;
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INSERT INTO t SELECT * FROM seq_2001_to_2500;
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INSERT INTO t SELECT * FROM seq_2501_to_3000;
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INSERT INTO t SELECT * FROM seq_3001_to_3500;
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INSERT INTO t SELECT * FROM seq_3501_to_4000;
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INSERT INTO t SELECT * FROM seq_4001_to_4500;
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INSERT INTO t SELECT * FROM seq_4501_to_5000;
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ROLLBACK;
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SELECT if(variable_value-@log_writes<10,'ok',variable_value-@log_writes)
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FROM information_schema.global_status WHERE variable_name='innodb_log_writes';
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if(variable_value-@log_writes<10,'ok',variable_value-@log_writes)
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ok
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disconnect prevent_purge;
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SELECT variable_value>0 FROM information_schema.global_status
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WHERE variable_name = 'INNODB_BUFFER_POOL_PAGES_DIRTY';
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variable_value>0
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1
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SET GLOBAL innodb_max_dirty_pages_pct=0.0;
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DROP TABLE t;
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SET GLOBAL innodb_max_dirty_pages_pct = @save_pct;
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SET GLOBAL innodb_max_dirty_pages_pct_lwm = @save_pct_lwm;
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