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Re: checkpoint_timeout

From: "Rafael Domiciano" <rafael(dot)domiciano(at)gmail(dot)com>
To: chirag(dot)dave(at)gmail(dot)com
Cc: "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org>
Subject: Re: checkpoint_timeout
Date: 2008-10-08 12:31:08
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-admin
The server is running Postgres 8.2.4When the server is doing too much
operations like I, U or D the postgres stop a while each 5 min...!
I mean "stopping" that I don't receive any response from postgres, and the
process the all people are running stay there, waiting for something.
I read a several names to it like: gap, stall, slowdown... I don't know the
write expression for this situation.

I hope you can help me.


Rafael Domiciano
Postgres DBA

2008/10/7 <chirag(dot)dave(at)gmail(dot)com>

> What version of postgres are you running ?  and please also provide more
> information about your suspected slowdown ?
> On Tue, Oct 7, 2008 at 4:21 PM, Rafael Domiciano <
> rafael(dot)domiciano(at)gmail(dot)com> wrote:
>> Hello there,
>> I'm having some slowndowns in my postgresql server, and I had been reading
>> something about checkpoints, that could resolve my problem.
>> Now, I have:
>> checkpoint_segments = 30                # in logfile segments, min 1, 16MB
>> each
>> #checkpoint_timeout = 5min
>> And I percebed that this slowndown is occuring for 5 min...! So I'm
>> suposing that the problem is in the checkpoint_timeout.
>> What's the impact to chang it to:
>> checkpoint_timeout = 2min or
>> checkpoint_timeout = 5min
>> Tnhks,
>> Rafael Domiciano

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