From: | "Jeffrey W(dot) Baker" <jwbaker(at)acm(dot)org> |
---|---|
To: | Ron Wills <ron(at)rwsoft(dot)ca> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Really bad diskio |
Date: | 2005-07-15 21:00:07 |
Message-ID: | 1121461207.28449.8.camel@toonses.gghcwest.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-performance |
On Fri, 2005-07-15 at 14:39 -0600, Ron Wills wrote:
> Hello all
>
> I'm running a postgres 7.4.5, on a dual 2.4Ghz Athlon, 1Gig RAM and
> an 3Ware SATA raid. Currently the database is only 16G with about 2
> tables with 500000+ row, one table 200000+ row and a few small
> tables. The larger tables get updated about every two hours. The
> problem I having with this server (which is in production) is the disk
> IO. On the larger tables I'm getting disk IO wait averages of
> ~70-90%. I've been tweaking the linux kernel as specified in the
> PostgreSQL documentations and switched to the deadline
> scheduler. Nothing seems to be fixing this. The queries are as
> optimized as I can get them. fsync is off in an attempt to help
> preformance still nothing. Are there any setting I should be look at
> the could improve on this???
Can you please characterize this a bit better? Send the output of
vmstat or iostat over several minutes, or similar diagnostic
information.
Also please describe your hardware more.
Regards,
Jeff Baker
From | Date | Subject | |
---|---|---|---|
Next Message | Ron Wills | 2005-07-15 21:04:35 | Re: Really bad diskio |
Previous Message | Joshua D. Drake | 2005-07-15 20:45:07 | Re: Really bad diskio |