Determining Apache (Average) Per-Process Memory Usage

ps -ylC httpd --sort:rss | awk '{sum+=$8; ++n} END {print "Tot="sum"("n")";print "Avg="sum"/"n"="sum/n/1024"MB"}'

but this has the problem of counting 1 more process than actually exists, and it counts the root process as well – I’m really looking for the size (or average size) or child processes. The parent process needs to be examined separately.

… or simply ps -ylC httpd for a glance.

See also:

• Average Apache Process Memory Usage - Goettner.net
• memory usage - Finding Average size of single Apache process for setting MaxClients - Server Fault

• [Finding Apache’s Memory Usage

  Pseudo Random Bytes](http://arr.gr/blog/2007/05/finding-apaches-memory-usage/)

• [Apache

  Karl Rixon](http://www.karlrixon.co.uk/category/writing/apache/)