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288eeb3a31
Introduce a new storage engine API method commit_checkpoint_request(). This is used to replace the fsync() at the end of every storage engine commit with a single fsync() when a binlog is rotated. Binlog rotation is now done during group commit instead of being delayed until unlog(), removing some server stall and avoiding an expensive lock/unlock of LOCK_log inside unlog().
37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
SET GLOBAL innodb_flush_log_at_trx_commit=3;
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CREATE TABLE t1 (a INT PRIMARY KEY) ENGINE=innodb;
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INSERT INTO t1 VALUES (0);
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SET DEBUG_SYNC= "commit_after_get_LOCK_log SIGNAL con1_waiting WAIT_FOR con3_queued";
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SET DEBUG_SYNC= "commit_loop_entry_commit_ordered SIGNAL con1_loop WAIT_FOR con1_loop_cont EXECUTE 3";
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INSERT INTO t1 VALUES (1);
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SET DEBUG_SYNC= "now WAIT_FOR con1_waiting";
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SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL con2_queued";
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INSERT INTO t1 VALUES (2);
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SET DEBUG_SYNC= "now WAIT_FOR con2_queued";
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SET DEBUG_SYNC= "commit_after_prepare_ordered SIGNAL con3_queued";
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INSERT INTO t1 VALUES (3);
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SET DEBUG_SYNC= "now WAIT_FOR con1_loop";
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SET DEBUG_SYNC= "now SIGNAL con1_loop_cont";
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SET DEBUG_SYNC= "now WAIT_FOR con1_loop";
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SET DEBUG_SYNC= "now SIGNAL con1_loop_cont";
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SET DEBUG_SYNC= "now WAIT_FOR con1_loop";
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SELECT * FROM t1 ORDER BY a;
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a
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0
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1
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2
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SET SESSION debug_dbug="+d,crash_dispatch_command_before";
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SELECT 1;
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Got one of the listed errors
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Got one of the listed errors
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Got one of the listed errors
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SELECT * FROM t1 ORDER BY a;
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a
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0
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1
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2
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3
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InnoDB: Last MySQL binlog file position 0 947, file name ./master-bin.000001
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SET DEBUG_SYNC= 'RESET';
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DROP TABLE t1;
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