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Re: High %SYS CPU usage - Mailing list pgsql-performance

From Cesar Martin
Subject Re: High %SYS CPU usage
Date
Msg-id CAMAsR=4a5e5U7hqBs-EfNwCtbDjM4qGDE1JF=11nEfNVODAoXg@mail.gmail.com
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In response to Re: High %SYS CPU usage  (Josh Berkus <josh@agliodbs.com>)
Responses Re: High %SYS CPU usage
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Hi Josh,

Today is not the worse day for this issue, because Fridays DB have little workload... But I have this output:


I don't have updated OS server from the install.
I also begin to think that the problem is OS misconfiguration (Kernel parameters??) or Hardware problem...

Thanks for your help.


2012/10/30 Josh Berkus <josh@agliodbs.com>
Cesar,

> On this server I have only one database with 312GB of data. The database
> had run fine during 4 months, but from two months ago, during high work
> load periods, the server is collapsed by "%sys" type load.

Hmmm.  Have you updated Linux any time recently?  I'm wondering if this
is a PostgreSQL problem at all.  It sounds like an OS issue.

Can you give us the results of mpstat -P ALL 3 ?  The dstat output
doesn't tell me much.

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com


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César Martín Pérez
cmartinp@gmail.com

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