Re: checkpoints are occurring too frequently

Thanks!

-----Mensaje original-----
De: Gabriele Bartolini [mailto:Gabriele(dot)Bartolini(at)2ndQuadrant(dot)it]
Enviado el: jueves, 17 de noviembre de 2011 10:14 a.m.
Para: Anibal David Acosta
CC: pgsql-general(at)postgresql(dot)org
Asunto: Re: [GENERAL] checkpoints are occurring too frequently

Hi Anibal,

On Thu, 17 Nov 2011 09:48:10 -0300, "Anibal David Acosta"
<aa(at)devshock(dot)com> wrote:
> What should be a correct value for checkpoint_segments to avoid
> excessive checkpoint events?

There is no golden rule or value that fits all scenarios. Usually 32 is a good value to start with, however it might not be perfectly tailored for your environment.

To give you an idea, currently you are issuing a checkpoint every 32*16MB of WAL traffic (or every 10 minutes). Maybe you can describe us better your workload, if it is subject to usage spikes or regularly distributed throughout the day mainly in terms of inserts/updates/deletes.

I would gradually try and increase checkpoint_segments by 32 and monitor the effects.

Cheers,
Gabriele

--
Gabriele Bartolini - 2ndQuadrant Italia
PostgreSQL Training, Services and Support
Gabriele(dot)Bartolini(at)2ndQuadrant(dot)it - www.2ndQuadrant.it