| From: | Shaun Thomas <sthomas(at)peak6(dot)com> |
|---|---|
| To: | Andrey Vorobiev <andrey(dot)o(dot)vorobiev(at)gmail(dot)com> |
| Cc: | <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Performance degradation of inserts when database size grows |
| Date: | 2011-05-23 13:30:34 |
| Message-ID: | 4DDA617A.6090105@peak6.com |
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| Thread: | |
| Lists: | pgsql-performance |
On 05/17/2011 07:45 AM, Andrey Vorobiev wrote:
> 2011-05-17 18:55:51 NOVST LOG: checkpoint starting: xlog
> 2011-05-17 18:57:20 NOVST LOG: checkpoint complete: wrote 62861 buffers
> (24.0%); 0 transaction log file(s) added, 0 removed, 0 recycled;
> write=89.196 s, sync=0.029 s, total=89.242 s
Increase your checkpoint_segments. If you see "checkpoint starting:
xlog" instead of "checkpoint starting: time", you don't have enough
checkpoint segments to handle your writes. Checkpoints *will* degrade
your throughput.
--
Shaun Thomas
OptionsHouse | 141 W. Jackson Blvd. | Suite 800 | Chicago IL, 60604
312-676-8870
sthomas(at)peak6(dot)com
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