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by zorlem 4530 days ago
In addition (or even instead of) to htop I strongly recommend atop [0]. This tool has been of an invaluable help to me during a lot of diagnostic sessions.

It can collect detailed memory usage profile of processes and when combined with some smart scripting it has a nice leak detection functionality [1]. Very useful when you run out of memory and want to find which daemon has used all of it.

[0] http://www.atoptool.nl/

[1] http://www.atoptool.nl/download/case_leakage.pdf

edit: formatting