Re: Create and drop temp table in 8.3.4

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
>
--

In response to

Responses

Browse pgsql-performance by date

  From Date Subject
Next Message Kevin Grittner 2008-11-06 19:35:26 Re: Create and drop temp table in 8.3.4
Previous Message Kevin Grittner 2008-11-06 19:02:55 Re: Create and drop temp table in 8.3.4