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MDEV-232: Remove one fsync() from commit phase.

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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().
This commit is contained in:
unknown
2012-09-13 14:31:29 +02:00
parent 0697ee265f
commit 288eeb3a31
43 changed files with 1331 additions and 476 deletions
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mysql-test/r/mysqlbinlog.result
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@@ -892,6 +892,7 @@ DROP DATABASE test1;
FLUSH LOGS;
show binlog events in 'master-bin.000002' from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000002 # Binlog_checkpoint # # master-bin.000002
master-bin.000002 # Query # # CREATE DATABASE test1
master-bin.000002 # Query # # use `test1`; CREATE TABLE t1(id int)
master-bin.000002 # Query # # DROP DATABASE test1