Re: How to reduce impact of a query. - Mailing list pgsql-general

From Isak Hansen
Subject Re: How to reduce impact of a query.
Date
Msg-id 6b9e1eb20811170454g1b96e8ffp55585f54d99de7e8@mail.gmail.com
Whole thread Raw
In response to How to reduce impact of a query.  (Howard Cole <howardnews@selestial.com>)
List pgsql-general
On Mon, Nov 17, 2008 at 1:15 PM, Howard Cole <howardnews@selestial.com> wrote:
> Hi,
>
> I am running multiple 8.2 databases on a not-so-powerful W2K3 server - and
> it runs great - for the majority of time. However I have some monster
> tsearch queries which take a lot of processing and hog system resources -
> especially disk.
>
> I am not concerned with the amount of time or speed of the tsearch2 query,
> which is doing a lot of work, all I need to do is make sure that the query
> does not impact all other databases and queries running on the same machine.
>
> The machine in question is a 1GB Ram, AMD 64 with Raid 1 Sata disks. Non
> standard parts of my postgresql.conf are as follows:
> max_connections=100
> shared_buffers=128MB
> work_mem=4MB
> maintenance_work_mem=256MB
> max_fsm_pages=204800
> max_fsm_relations=1500
>
> Any tips appreciated.

Not directly related to your question, but if effective_cache_size
hasn't been changed from the default, adjusting it could improve
overall performance a fair bit.


Regards,
Isak

pgsql-general by date:

Previous
From: "Mr. John"
Date:
Subject: Re: Problem with pg_restore into new database
Next
From: "Isak Hansen"
Date:
Subject: Re: FreeBSD 7 needing to allocate lots of shared memory