Re: Tunning FreeeBSD and PostgreSQL - Mailing list pgsql-performance

From Vivek Khera
Subject Re: Tunning FreeeBSD and PostgreSQL
Date
Msg-id 16157.18467.310482.384436@yertle.int.kciLink.com
Whole thread Raw
In response to Re: Tunning FreeeBSD and PostgreSQL  (Bruce Momjian <pgman@candle.pha.pa.us>)
Responses Re: Tunning FreeeBSD and PostgreSQL
List pgsql-performance
>>>>> "BM" == Bruce Momjian <pgman@candle.pha.pa.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.
Internet: khera@kciLink.com       Rockville, MD       +1-240-453-8497
AIM: vivekkhera Y!: vivek_khera   http://www.khera.org/~vivek/

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