| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Venkat Balaji <venkat(dot)balaji(at)verse(dot)in> |
| Cc: | PGSQL Performance <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: : PG9.0 - Checkpoint tuning and pg_stat_bgwriter |
| Date: | 2011-10-04 11:08:57 |
| Message-ID: | 4E8AE949.8030300@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-performance |
On 04.10.2011 13:50, Venkat Balaji wrote:
> I have got a situation where in i see the production system is loaded with
> the checkpoints and at-least 1000+ buffers are being written for every
> checkpoint.
1000 buffers isn't very much, that's only 8 MB, so that's not alarming
itself.
> I am thinking of increasing the checkpoint_segments.
>
> Below are our current settings -
>
> checkpoint_segments = 8
> checkpoint_timeout = 5 mins
> checkpoint_completion_target = 0.5
> bgwriter_delay = 200ms
> bgwriter_lru_maxpages = 100
> bgwriter_lru_multiplier = 2
>
> Looking forward for suggestions.
Yep, increase checkpoint_segments. And you probably want to raise
checkpoint_timeout too.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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