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Memory Usage on WebFaction

If you're hosting your website on WebFaction, it's very easy to spin up multiple django instances and completely use up allocated memory, specially if you have the 80MB limit.

WebFaction panel does not let you keep track of Memory usage, just disk and bandwidth. Here's a little shell command, that will calculate your memory usage in KiloBytes:

ps -u username -O pid,rss,command | awk '{sum += $3} END {print sum}'

Remove the pipe and remainder of the command to see a detailed listing of Process IDs, Memory Usage and the Commands that invoked the applications using memory.

If you have too many httpd processes running, you may have set you ServerLimit too high. If you're on the 80MB limit host plan and have 2/3 django instances running, set the following in your Apache httpd.conf:

ServerLimit 3