Re: How to reduce impact of a query.

On Mon, Nov 17, 2008 at 1:15 PM, Howard Cole <howardnews(at)selestial(dot)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