Skip site navigation (1) Skip section navigation (2)

Re: Slow deletes in 8.1 when FKs are involved

From: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>
To: Will Reese <wreese(at)rackspace(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: Slow deletes in 8.1 when FKs are involved
Date: 2006-04-24 17:09:15
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On Sun, Apr 23, 2006 at 09:41:14PM -0500, Will Reese wrote:
> I'm preparing for an upgrade from PostgreSQL 7.4.5 to 8.1.3, and I  
> noticed a potential performance issue.
> I have two servers, a dual proc Dell with raid 5 running PostgreSQL  
> 7.4, and a quad proc Dell with a storage array running PostgreSQL  
> 8.1. Both servers have identical postgresql.conf settings and were  

BTW, you'll want to tweak some things between the two .conf files,
especially if the 8.1.3 server has more memory. Faster drive array means
you probably want to tweak random_page_cost down.

Also, 8.1.3 has a lot of new config settings compared to 7.4.x; it'd
probably be best to take the default 8.1 config and tweak it, rather
than bringing the 7.4 config over.
Jim C. Nasby, Sr. Engineering Consultant      jnasby(at)pervasive(dot)com
Pervasive Software    work: 512-231-6117
vcard:       cell: 512-569-9461

In response to

pgsql-performance by date

Next:From: Simon RiggsDate: 2006-04-24 17:27:31
Subject: Re: Recovery will take 10 hours
Previous:From: Alex HaywardDate: 2006-04-24 14:36:24
Subject: Re: Hardware: HP StorageWorks MSA 1500

Privacy Policy | About PostgreSQL
Copyright © 1996-2017 The PostgreSQL Global Development Group