Message-ID: <4CC6CFAA.10107@one.com>
Date: Tue, 26 Oct 2010 14:55:06 +0200
From: Christian Elmerot <ce@one.com>
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To: pgsql-performance@postgresql.org
Subject: CPUs for new databases
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Hello,

What is the general view of performance CPU's nowadays when it comes to 
PostgreSQL performance? Which CPU is the better choice, in regards to 
RAM access-times, stream speed, cache synchronization etc. Which is the 
better CPU given the limitation of using AMD64 (x86-64)?

We're getting ready to replace our (now) aging db servers with some 
brand new with higher core count. The old ones are 4-socket dual-core 
Opteron 8218's with 48GB RAM. Right now the disk-subsystem is not the 
limiting factor so we're aiming for higher core-count and as well as 
faster and more RAM. We're also moving into the territory of version 9.0 
with streaming replication to be able to offload at least a part of the 
read-only queries to the slave database. The connection count on the 
database usually lies in the region of ~2500 connections and the 
database is small enough that it can be kept entirely in RAM (dump is 
about 2,5GB).

Regards,
Christian Elmerot