From: David Rees <dbr@greenhydrant.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Very High Load, kernel 2.4.18, apache/mysql
Date: Mon, 30 Sep 2002 22:36:49 -0700 [thread overview]
Message-ID: <20020930223649.A20225@greenhydrant.com> (raw)
In-Reply-To: <B7E52DA4-D0C3-11D6-8C5C-000502C90EA3@Whitewlf.net>; from Whitewlf@Whitewlf.net on Wed, Sep 25, 2002 at 04:16:47PM -0400
I can second the PHPA recommendation. Since you appear to be CPU bound
doing a lot of processing in httpd, anything you can do to speed them up
will help. PHPA showed significant performance increases in my tests.
-Dave
On Wed, Sep 25, 2002 at 04:16:47PM -0400, Adam Goldstein wrote:
> During my investigation of php accelerator (which we put off before
> thinking it would be better to stabilize the server first) I came
> across a small blurb about php 4.1.2 (which we use) and mysql.
>
> http://www.php-accelerator.co.uk/faq.php#segv2
>
> Apparently this is how the site is written in some places, and it
> causes instability in the php portion of the apache process. We are
> fixing this now. Also, with the nodiratime, noatime, ext2 combination,
> the load has decreased a little, but, not very much. It has still
> reached >25 load when apache processes reached 120 (112 active
> according to server-status) and page loads come to near dead stop...
> segfaults still exist, even with fixed mysql connection calls. :(
> 1-4/min under present 25+ load.
>
> As for the syslog, unfort. almost every entry was marked async. I
> changed an auth log entry but messages was already async. I left
> kernel.errors sync, as It never really logs.
>
> On Wednesday, September 25, 2002, at 04:55 AM, Randal, Phil wrote:
>
> > Have you tried using PHP Accelerator?
> >
> > It's the only free PHP Cache which has survived my testing,
> > and should certainly reduce your CPU load.
next prev parent reply other threads:[~2002-10-01 5:31 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0EBC45FCABFC95428EBFC3A51B368C9501AF4F@jessica.herefordshire.gov.uk>
2002-09-25 20:16 ` Very High Load, kernel 2.4.18, apache/mysql Adam Goldstein
2002-09-25 21:26 ` Roger Larsson
2002-09-26 3:03 ` Ernst Herzberg
2002-09-26 18:36 ` Marco Colombo
2002-09-26 19:27 ` Rik van Riel
2002-09-26 20:02 ` Marco Colombo
2002-09-26 20:09 ` Rik van Riel
2002-09-26 20:25 ` Ernst Herzberg
2002-09-27 8:52 ` Martin Brulisauer
2002-10-01 5:36 ` David Rees [this message]
[not found] <3D90FD7B.9080209@wanadoo.fr>
2002-09-25 1:12 ` Adam Goldstein
2002-09-24 23:27 Adam Goldstein
2002-09-25 0:59 ` Roger Larsson
2002-09-25 1:28 ` Rik van Riel
2002-09-25 2:38 ` Adam Goldstein
2002-09-25 5:24 ` Simon Kirby
2002-09-25 6:56 ` Adam Goldstein
2002-09-25 7:20 ` Simon Kirby
2002-09-25 7:51 ` Paweł Krawczyk
2002-09-25 13:13 ` Rik van Riel
2002-09-25 22:54 ` Jose Luis Domingo Lopez
2002-09-26 17:09 ` Joachim Breuer
2002-09-26 17:16 ` Rik van Riel
2002-09-25 3:50 ` Bernd Eckenfels
2002-09-25 3:48 ` Bernd Eckenfels
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