Messages in this thread | | | Date | Mon, 30 Sep 2002 22:36:49 -0700 | From | David Rees <> | Subject | Re: Very High Load, kernel 2.4.18, apache/mysql |
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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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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