From: | Rod Taylor <rbt(at)rbt(dot)ca> |
---|---|
To: | Manfred Koizar <mkoi-pg(at)aon(dot)at> |
Cc: | Daniel Kalchev <daniel(at)digsys(dot)bg>, PostgresSQL Hackers Mailing List <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Offering tuned config files |
Date: | 2003-02-14 16:55:59 |
Message-ID: | 1045241758.51125.4.camel@jester |
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Lists: | pgsql-hackers |
On Fri, 2003-02-14 at 07:41, Manfred Koizar wrote:
> On Fri, 14 Feb 2003 14:24:23 +0200, Daniel Kalchev <daniel(at)digsys(dot)bg>
> wrote:
> >The default [cache] on BSD systems is 10% of the total RAM, so on a 256MB machine this
> >would be ~26MB or effective_cache_size = 32000.
>
> I was a bit too Linux-minded, where every peace of memory not needed
> for anything else can be used as cache. Thanks for the clarification.
> And sorry for my ignorance.
I think you're getting the two confused. I'm not sure about linux, but
on BSD (FreeBSD) the cache and buffer are mostly unrelated.
Cache: number of pages used for VM-level disk caching
Buf: number of pages used for BIO-level disk caching
--
Rod Taylor <rbt(at)rbt(dot)ca>
PGP Key: http://www.rbt.ca/rbtpub.asc
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