Web-server – How to analyze which virtual host account is most greedy

apache-2.2memorytroubleshootingvirtualhostweb-server

Hi there and sorry if this is too noobish.
I've tried to find the answer myself as I usually do but I failed.

What is the best practice when I need to analyze which virtual hosts are consuming the most of the system resources – especially memory?

top or ps aux seems useless as all virtual hosts related processes are running under the same – apache – user

What about log analysis – is this the way? I've got access logs separated for individual virtual hosts if this information is of any value for you.

This question is definitely related but it didn't helped my issue:
Tracking Apache by VirtualHost

If you need any more info let me know … I'll be around.
Thanks in advance.

Best Answer

Have a look at mod_status and in particular the extended status. It should be easy enough to match the PID given in the server-status page to the output of top and ps.

Related Solutions

Debian – Apache virtual host configuration on debian

It doesn't matter what address you use. If the IP address is the same, you could use site3.com and still access site1. The first VirtualHost will be served for all hostnames that don't match any ServerName or ServerAlias. You need to symlink the site2.com.conf file (or use a2ensite) to be able to access it.

How to tell which config file Apache is using

With any *nix application, the easiest method is to query the binary itself. In the case of httpd, I'd imagine the process would be something like this:

$ whereis httpd
/usr/sbin/httpd
$ /usr/sbin/httpd -V
Server version: Apache/2.2.11 (Unix)
Server built:   Jun 17 2009 14:55:13
Server's Module Magic Number: 20051115:21
Server loaded:  APR 1.2.7, APR-Util 1.2.7
Compiled using: APR 1.2.7, APR-Util 1.2.7
Architecture:   64-bit
Server MPM:     Prefork
  threaded:     no
    forked:     yes (variable process count)
Server compiled with....
 -D APACHE_MPM_DIR="server/mpm/prefork"
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_FLOCK_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=128
 -D HTTPD_ROOT="/usr"
 -D SUEXEC_BIN="/usr/bin/suexec"
 -D DEFAULT_PIDLOG="/private/var/run/httpd.pid"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_LOCKFILE="/private/var/run/accept.lock"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D AP_TYPES_CONFIG_FILE="/private/etc/apache2/mime.types"
 -D SERVER_CONFIG_FILE="/private/etc/apache2/httpd.conf"

As you can see - my OS X says the binary, if not directed otherwise, will use the config file: /private/etc/apache2/httpd.conf

If that doesn't help, perhaps Christopher's suggestion of find is the next step.

Best Answer

Related Solutions

Debian – Apache virtual host configuration on debian

How to tell which config file Apache is using

Related Topic