HI all, My first mailing, so forgive me if something aint as correct as should be :)Anyway, as there is no good seacht option in archives, i searched in last 3 months, but did not find what I was looking for, therefore, an mail to all.
I have an dedicated server. It runs Debian Sarge, with: Server version: Apache/2.0.54 Server built: Sep 5 2005 11:15:09 PHP 4.3.10-16.1 (cli) (built: Feb 25 2006 04:17:45) Copyright (c) 1997-2004 The PHP Group Zend Engine v1.3.0, Copyright (c) 1998-2004 Zend Technologies mysql Ver 12.22 Distrib 4.0.24, for pc-linux-gnu (i386) It is an AMD 2.6 with 512 MB RAM (will be soon upgraded to 2 GB).However, this is the problem I have with it. I have very few sites on it, 6 in total, but only one has some more visits (+/- 1.000 unique per day, with +/- 25.000 pages per day).
It has an custom build script for PHP uploads, and apache handles downloads themself.
Problem: few times a day (5+) CPU goes to 99% wait time. In this period, everything basicly freezes (http, ftp, ssh). I can do almost nothing with machine. It is always one of the apache proccess, but I can not find what exactly. I have however found out that I/O goes nuts at those moments, so it is doing something with hard disk. I have optimised script for as much as possible, but there is still some moving of larger files between 2 hard disks. No file is larger then 100 MB, so I can imagine this takes some CPU time. But manually moving such file takes no longer then 15-20 seconds, while CPU stands for up to few minutes @ 99% wait time. (php will be rewritten to use cp insted of mv command as PHP people say it saves on performance as well on moving larger files).
My question is: how can I optimise even more Apache proccess (master, child...?). Apache needs to handle larger (20-100 MB) downloads, some on very slow connections (33,6 k modem). httpd.conf available upon request.
I have setted up server-status and server-info, also tried ab tool from Apache, but to be honest, I have no idea what all those numbers represent or what to do with them :(
So, who could guide me in the right direction to pin-point the problem and to solve it? I am root on the machine, so I can do everything (though, my knowledge may be bottleneck).
Thank you in advance! Best regards, Aleksandar Skodric --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
|