Re: Tunning FreeeBSD and PostgreSQL

From: Vivek Khera <khera(at)kcilink(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Tunning FreeeBSD and PostgreSQL
Date: 2003-07-22 14:20:19
Message-ID: 16157.18467.310482.384436@yertle.int.kciLink.com
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>>>>> "BM" == Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:

>> not anything pre-allocated (from my understanding). These settings
>> allow for up to 100,000 shared buffers (I currently only use 30,000
>> buffers)

BM> I think the only downside to making them too big is that you allocate
BM> page tables and prevent that address range from being used by other

Does this apply in general or just on FreeBSD?

BM> processes. Of course, if you have much less than 4 gigs of RAM in the
BM> machine, it probably isn't an issue.

Probably, but wasting page table entries is never a good idea...

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Vivek Khera, Ph.D. Khera Communications, Inc.
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AIM: vivekkhera Y!: vivek_khera http://www.khera.org/~vivek/

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