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Setting Shared Buffers , Effective Cache, Sort Mem Parameters

From: Pallav Kalva <pkalva(at)deg(dot)cc>
To: pgsql-performance(at)postgresql(dot)org
Subject: Setting Shared Buffers , Effective Cache, Sort Mem Parameters
Date: 2004-04-22 17:51:42
Message-ID: 4088062E.2050901@deg.cc (view raw or flat)
Thread:
Lists: pgsql-performance
Hi

    We are in the process of building a new machine for our production 
database. Below you will see some of the harware specs for the machine. 
I need some help with setting these parameters (shared buffers, 
effective cache, sort mem) in the pg_conf file.  Also can anyone explain 
the difference between shared buffers and effective cache , how these 
are allocated in the main memory (the docs are not clear on this).

Here are the Hardware details:
Operating System: Red Hat 9
Database Ver: Postgres 7.4
CPU'S : 4
RAM : 4 gig
Datafile layout : RAID 1+0
Transaction log : on different RAID1 Array
RAID Stripe Size: 8k


Thanks!
Pallav


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