| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | "scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com>, <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: postgresql.conf |
| Date: | 2003-07-30 17:19:21 |
| Message-ID: | 200307301019.21870.josh@agliodbs.com |
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| Lists: | pgsql-performance |
Scott,
> I'm guessing OLTP needs things like FSM cranked up,
> OLAP (a for analytical) needs more shared buffers and sort memory
> Webserver might be better served just slightly higher values than default
> but well under those of either OLTP or OLAP...
Yes. Take sort_mem for example:
OLTP_SM 1024
OLTP_LM 2048
OLAP_SM 4096
OLAP_LM 16384
WWW_SM 512
WWW_LM 1024
Workstation 1024
The basic idea is:
More RAM => more sort_mem
More concurrent queries => less sort_mem
Larger data sets => more sort_mem
Lots of grouped aggregates => more sort_mem
--
-Josh Berkus
Aglio Database Solutions
San Francisco
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