Re: High SYS CPU - need advise - Mailing list pgsql-general

From Merlin Moncure
Subject Re: High SYS CPU - need advise
Date
Msg-id CAHyXU0yus50=7Bz81Dm7syuU1qohfTVcv=2fxZDBXj7M3UT-jw@mail.gmail.com
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In response to Re: High SYS CPU - need advise  (Vlad <marchenko@gmail.com>)
Responses Re: High SYS CPU - need advise  (Vlad <marchenko@gmail.com>)
Re: High SYS CPU - need advise  (Shaun Thomas <sthomas@optionshouse.com>)
List pgsql-general
On Fri, Nov 16, 2012 at 2:13 PM, Vlad <marchenko@gmail.com> wrote:
> ok, I've applied that patch and ran. The stall started around 13:50:45...50
> and lasted until the end
>
> https://dl.dropbox.com/u/109778/postgresql-2012-11-16_134904-stripped.log
>
> the actual log has more data (including statement following each 'spin
> delay' record), but there is some sensitive info inside which I can't share
> with public.

first thoughts:
no single thing really stands out -- contention is all over the place.
lwlock, pinbuffer, dynahash (especially).  I am again suspicious of
bad scheduler interaction.  any chance we can fire up pgbouncer?

merlin


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