Re: Sustained inserts per sec ... ?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Christopher Petrilli <petrilli(at)gmail(dot)com>
Cc: "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Sustained inserts per sec ... ?
Date: 2005-04-01 20:58:45
Message-ID: 28517.1112389125@sss.pgh.pa.us
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Christopher Petrilli <petrilli(at)gmail(dot)com> writes:
> What seems to happen is it slams into a "wall" of some sort, the
> system goes into disk write frenzy (wait=90% CPU), and eventually
> recovers and starts running for a while at a more normal speed.

Checkpoint maybe? If so, tweaking the bgwriter parameters might
improve matters.

regards, tom lane

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