If you’re experiencing memory usage issues, such as high memory usage, use the following steps to troubleshoot.
SSH into your server and install htop:
$ sudo apt-get install htop
Once it’s installed, run it with htop:
The screen above will show you lots of statistics on memory and CPU usage, but we’ll make two changes to make potential issues more visible:
- Hit F2 (setup), Display options, and enable Hide userland threads by hitting the spacebar once selected. Hit q to exit this screen.
- On the home screen, hit F6 (sort by), and select MEM%, which will sort your processes by memory usage.
Once done, this view should give you a good idea of which processes are using the most memory.