From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
---|---|
To: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov> |
Cc: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Create and drop temp table in 8.3.4 |
Date: | 2008-11-06 19:17:51 |
Message-ID: | 1225999071.1204.14.camel@jd-laptop.pragmaticzealot.org |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-performance |
On Thu, 2008-11-06 at 13:02 -0600, Kevin Grittner wrote:
> >>> "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov> wrote:
> > If I find a particular tweak to the background writer or some such
> is
> > particularly beneficial, I'll post again.
>
> It turns out that it was not the PostgreSQL version which was
> primarily responsible for the performance difference. We updated the
> kernel at the same time we rolled out 8.3.4, and the new kernel
> defaulted to using write barriers, while the old kernel didn't. Since
> we have a BBU RAID controller, we will add nobarrier to the fstab
> entries. This makes file creation and unlink each about 20 times
> faster.
Woah... which version of the kernel was old and new?
>
> -Kevin
>
--
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