Details
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Type:
Bug
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Status: Closed
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Priority:
Trivial
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Resolution: Fixed
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Affects Version/s: 10.0.14
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Fix Version/s: 10.0.15
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Component/s: Storage Engine - InnoDB, Storage Engine - XtraDB
Description
http://bugs.mysql.com/bug.php?id=72520
In os_event_wait_time_low() the logic to calculate abs_time
for wait is broken. The bug has been present at least since
5.5. It gets acutely sensitized when sub-second wait intervals
are passed. It is particularly relevant to us because the
page_cleaner thread will mostly request sub-second wait
intervals. This can potentially lead to a near tight loop
behaviour of page_cleaner with much less sleep then what we'd
actually expect.
Gliffy Diagrams
Attachments
Issue Links
- is part of
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MDEV-6039 WebScaleSQL patches
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- Closed
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Activity
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revno: 4454
committer: Jan Lindström <jplindst@mariadb.org>
branch nick: 10.0-innodb
timestamp: Fri 2014-10-24 17:11:09 +0300
message:
MDEV-6934: os_event_wait_time_low(): wait time calculation is messed upMerged Facebook commit bdab302a7e3c37da21a1bffe1550cdbe6c906695
by Inaam Rana from https://github.com/facebook/mysql-5.6.
In os_event_wait_time_low() the logic to calculate abs_time
for wait is broken. The bug has been present at least since
5.5. It gets acutely sensitized when sub-second wait intervals
are passed. It is particularly relevant to us because the
page_cleaner thread will mostly request sub-second wait
intervals. This can potentially lead to a near tight loop
behaviour of page_cleaner with much less sleep then what we'd
actually expect.