| From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
|---|---|
| To: | Jordan Tomkinson <jordan(at)moodle(dot)com> |
| Cc: | Aidan Van Dyk <aidan(at)highrise(dot)ca>, Greg Smith <gsmith(at)gregsmith(dot)com>, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: High cpu usage after many inserts |
| Date: | 2009-02-25 00:23:53 |
| Message-ID: | 1235521433.9565.103.camel@jd-laptop.pragmaticzealot.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
On Wed, 2009-02-25 at 09:21 +0900, Jordan Tomkinson wrote:
>
> On Wed, Feb 25, 2009 at 12:05 AM, Aidan Van Dyk <aidan(at)highrise(dot)ca>
> wrote:
> * Greg Smith <gsmith(at)gregsmith(dot)com> [090201 00:00]:
>
> > Shouldn't someone have ranted about RAID-5 by this point in
> the thread?
>
>
> What? Sorry, I wasn't paying attention...
>
> You mean someone's actually still using RAID-5?
>
> ;-)
>
> What exactly is wrong with RAID5 and what should we have gone with?
RAID5 outside of RAID 0 is the worst possible RAID level to run with a
database. (of the commonly used raid level's that is).
It is very, very slow on random writes which is what databases do.
Switch to RAID 10.
Sincerely,
Joshua D. Drkae
>
>
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