Re: Trying to minimize the impact of checkpoints

From: Jan Wieck <JanWieck(at)Yahoo(dot)com>
To: jao(at)geophile(dot)com
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Trying to minimize the impact of checkpoints
Date: 2004-06-12 17:27:22
Message-ID: 40CB3CFA.7040201@Yahoo.com
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On 6/11/2004 2:02 PM, jao(at)geophile(dot)com wrote:

> Quoting jao(at)geophile(dot)com:
>
>> When a checkpoint occurs, all operations slow way, way down.
>> The attached spreadsheet (xls file, prepared in OO so unlikely
>> to be dangerous) shows a run of a few hours, and the various spikes
>> every 25-30 minutes seem consistent with checkpointing. The
>> application is doing 1/2 reads and 1/2 inserts during this time.
>
> Sorry for being cryptic in my message. The spreadsheet contains
> iostat output.

Did you try to play with the background writer config options (new in
7.5) at all?

Jan

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