[MDEV-6931] Page cleaner should do LRU flushing regardless of server activity Created: 2014-10-24  Updated: 2014-10-24  Resolved: 2014-10-24

Status: Closed
Project: MariaDB Server
Component/s: Storage Engine - InnoDB, Storage Engine - XtraDB
Affects Version/s: 10.0.14
Fix Version/s: 10.0.15

Type: Bug Priority: Minor
Reporter: Jan Lindström (Inactive) Assignee: Jan Lindström (Inactive)
Resolution: Fixed Votes: 0
Labels: innodb, xtradb

Issue Links:
PartOf
is part of MDEV-6039 WebScaleSQL patches Closed

 Description   

This is fix for upstream bug
http://bugs.mysql.com/bug.php?id=71988
http://bugs.mysql.com/bug.php?id=70500

page_cleaner should work whether or not there is server activity.
Its iterations become a noop when there is no work to do but we
should not tie it to the server activity.

The page_cleaner thread does spurious background flushing
because of conditional sleep between iterations. The solution
is not to make sleep dependent on server activity etc.

 Comments   
Comment by Jan Lindström (Inactive) [ 2014-10-24 ]

revno: 4456
committer: Jan Lindström <jplindst@mariadb.org>
branch nick: 10.0-innodb
timestamp: Fri 2014-10-24 18:58:04 +0300
message:
MDEV-6931: Page cleaner should do LRU flushing regardless of server activity

Merge Facebook commit 926a077b14b73c14094de7fc7aa913241b801b4d
authored by Inaam Rana from https://github.com/facebook/mysql-5.6.

This is fix for upstream bugs
http://bugs.mysql.com/bug.php?id=71988
http://bugs.mysql.com/bug.php?id=70500

page_cleaner should work whether or not there is server activity.
Its iterations become a noop when there is no work to do but we
should not tie it to the server activity.

The page_cleaner thread does spurious background flushing
because of conditional sleep between iterations. The solution
is not to make sleep dependent on server activity etc.

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