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From:Raghavendra D Prabhu Date:July 1 2012 10:52am
Subject:Re: most mysqld instances running with 100% CPU
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Hi,


* On Sun, Jul 01, 2012 at 12:44:42PM +0200, Reindl Harald <h.reindl@stripped>
wrote:
>i notice since this night all mysqld instances
>suing innodb are running at very high CPU, there
>is nothing in the mysqld-log and after restarting
>the service the same again
>
>i do not think this has to to with the reason taking
>back 5.5.25 becasue no disk-IO, i more doubt this
>has to do with the time-correction-second (not sure
>how to translate "Schaltsekunde" to english) because
>it started late at night
>______________________
>
>http://dev.mysql.com/doc/refman/5.5/en/news-5-5-25a.html
>
>BTW: since there are announcements of new versions of
>mysqld it is very rude take them back without any
>announcement and put after weeks some lines in the old
>changelog which nobody reads after rollout
>
>however, as said, i doubt this is not the problem
>

It has to do with  http://bugs.mysql.com/bug.php?id=65778 

More analysis here:


http://blog.mozilla.org/it/2012/06/30/mysql-and-the-leap-second-high-cpu-and-the-fix/ 
http://serverfault.com/questions/403732/anyone-else-experiencing-high-rates-of-linux-server-crashes-during-a-leap-second

It is more of a linux kernel bug (affecting RHEL >=6 in the 
enterprise kernels category).



Regards,
-- 
Raghavendra D Prabhu (TZ: GMT + 530) 
Call: +91 96118 00062
mailto:raghavendra.prabhu@stripped
Percona, Inc. - http://www.percona.com / Blog: http://www.mysqlperformanceblog.com/
Skype: percona.raghavendrap
GPG: 0xD72BE977

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most mysqld instances running with 100% CPUReindl Harald1 Jul
  • Re: most mysqld instances running with 100% CPURaghavendra D Prabhu1 Jul
    • Re: most mysqld instances running with 100% CPUReindl Harald1 Jul