From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Rick Gigger <rick(at)alpinenetworking(dot)com>, Doug McNaught <doug(at)mcnaught(dot)org>, "scott(dot)marlowe" <scott(dot)marlowe(at)ihs(dot)com>, PgSQL General ML <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: performance problem |
Date: | 2003-11-20 23:50:34 |
Message-ID: | 200311202350.hAKNoYr23484@candle.pha.pa.us |
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Lists: | pgsql-admin pgsql-general |
Tom Lane wrote:
> "Rick Gigger" <rick(at)alpinenetworking(dot)com> writes:
> > I am confused. In this tutorial (by Bruce Momjian)
> > http://candle.pha.pa.us/main/writings/pgsql/hw_performance/node8.html
> > it says: "As a start for tuning, use 25% of RAM for cache size, and 2-4% for
> > sort size."
>
> That advice is widely considered obsolete --- it was developed in the
> days when typical RAM sizes were a lot less than today. I don't believe
> anyone has shown a good case for setting shared_buffers much higher than
> 10000.
Yes, I will update that page shortly.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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