Which processes are using the processors the most? (I suspect your imap server might be more responsible than apache.)
John Hicks
On 09/08/2010 03:42 PM, Paras pradhan wrote:
Hi,
Looking for recommendations.
I need to serve 100-200+ concurrent users to provide php based webmail client (horde). I have setup memcached and php-fastcgid for this purpose. The server has four 2.2G AMD optereon cores with 8GB of memory. I am doing stress test using ab as: ab -t 36000 -c 100 https://url/h/imp/login.php. What I have noticed if the number of concurrent users are more than around 25, I get the sluggish performance and I can see linux load rising high to 25 to 30 and all the cpu cores are approximately 75% used.
This is what I have in config files:
mpm worker:
--
<IfModule worker.c>
StartServers 15
MaxClients 960
MinSpareThreads 75
MaxSpareThreads 150
ThreadsPerChild 64
MaxRequestsPerChild 5000
--
memcached: 4GB
---
fcgid:
<IfModule !mod_fastcgi.c>
AddHandler fcgid-script .fcgi
MaxRequestsPerProcess 10000
MaxProcessCount 100
IPCCommTimeout 240
IdleTimeout 240
ProcessLifeTime 300
BusyTimeout 300
DefaultMaxClassProcessCount 100
DefaultMinClassProcessCount 50
</IfModule>
---
php-fcgid:
# Number of PHP childs that will be launched. Leave undefined to let PHP decide.
# DefaultInitEnv PHP_FCGI_CHILDREN 4
# Maximum requests before a process is stopped and a new one is launched
DefaultInitEnv PHP_FCGI_MAX_REQUESTS 10000
----
OS: RHEL 5.5
Apache: 2.2.3
PHP: 5.1
Mysql: 5.0
Will appreciate for any inputs.
Thanks!
Paras.
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