I recently noticed that something was using up lots of RAM on my Mac, as it would periodically slow down. I had some suspects, but rather than regularly checking in Activity Monitor, I thought it would be more helpful if I had a way to monitor usage of RAM by various processes over time.
Due to previous success with my Splunk Lab app, I decided to use it as the basis for building out a RAM monitoring app. The data acquisition part, however, was trickier. The output of the UNIX ps app isn’t very structured, and I had some problems parsing that data, especially in situations where there were spaces in filenames and arguments to those commands.
So I wrote a replacement for PS. It turns out that Python has a module called psutil, which lets you programmatically examine the process tree on your Mac. I ended up writing an app called Better PS, and it writes highly structured data on each current process to disk, which is then ingested by Splunk.Continue reading “Monitoring RAM Usage on OS/X”