Bug #72703 page cleaner should be multi-threaded also for recovery and shutdown
Submitted: 21 May 2014 6:46 Modified: 31 Jul 2014 5:45
Reporter: Yasufumi Kinoshita Email Updates:
Status: Closed Impact on me:
Category:MySQL Server: InnoDB storage engine Severity:S3 (Non-critical)
Version: OS:Any
Assigned to: CPU Architecture:Any

[21 May 2014 6:46] Yasufumi Kinoshita
From 5.7, page cleaner is multi-threaded for performance scalability.
But it is not used during shutdown and recovery phases.

It should be multi-threaded during shutdown and recovery phases for their optimal performance.

How to repeat:
During shutdown and recovery phases,
can be confirmed that buf_flush_page_cleaner_worker() is not worked.

Suggested fix:
make multi-threaded also for shutdown and recovery phases.
[28 Jul 2014 13:35] Daniel Price
Fixed as of the upcoming 5.7.5 release, and here's the changelog entry:

For optimal shutdown and recovery performance, shutdown and recovery
phases are now supported by the multi-threaded page cleaner feature
("innodb_page_cleaners") that was introduced in MySQL 5.7.4.

Also updated: