Context switch storm
От
creimer@brturbo.com.br
Тема
Context switch storm
Дата
Msg-id
efc1d7c07cf.454afe8d@brturbo.com.br
Список
Дерево обсуждения
Context switch storm creimer@brturbo.com.br
Re: Context switch storm Richard Huxton <dev@archonet.com>
Re: Context switch storm Cosimo Streppone <cosimo@streppone.it>
Re: Context switch storm Richard Huxton <dev@archonet.com>
Re: Context switch storm Andreas Kostyrka <andreas@kostyrka.org>
Re: Context switch storm Cosimo Streppone <cosimo@streppone.it>
Re: Context switch storm Cosimo Streppone <cosimo@streppone.it>
Re: Context switch storm Andreas Kostyrka <andreas@kostyrka.org>
Re: Context switch storm "Bucky Jordan" <bjordan@lumeta.com>
Re: Context switch storm "Merlin Moncure" <mmoncure@gmail.com>
Re: Context switch storm "Simon Riggs" <simon@2ndquadrant.com>
Re: Context switch storm "Jim C. Nasby" <jim@nasby.net>
Re: Context switch storm "Merlin Moncure" <mmoncure@gmail.com>
Re: Context switch storm Cosimo Streppone <cosimo@streppone.it>
Re: Context switch storm Jim Nasby <jim@nasby.net>
Re: Context switch storm creimer@brturbo.com.br
Re: Context switch storm Tom Lane <tgl@sss.pgh.pa.us>
Re: Context switch storm Richard Huxton <dev@archonet.com>
Re: Context switch storm Andreas Kostyrka <andreas@kostyrka.org>
Re: Context switch storm Richard Troy <rtroy@ScienceTools.com>
Re: Context switch storm Richard Huxton <dev@archonet.com>
Hi,
We've migrated one of our servers from pg 7.4 to 8.1 and from times to times (4 hours) the server start doing a lot of context switching and all transactions become very slow.
The average context switching for this server as vmstat shows is 1 but when the problem occurs it goes to 250000.
CPU and memory usage are ok.
What is producing this context switching storms?
It is a box with 16GB RAM and 4 XEON processors running RedHat Enterprise Linux AS.
Should I disable Hyperthreading?
Thank you in advance!
Reimer
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