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[29 Apr 2009 | 10 Comments | 37,765 views]

This is a guest post by Dayid http://dayid.org
There are better options to see your memory usage; however it seems `free` is more attune to creating the confusion I’m attempting to quell here. That said, see the Redhat docs about /proc/meminfo
Other commands to use to see memory usage

$ vmstat -aS M #see the “inactive” column for a rough “free” idea.

The real answer
There’s no reason to clear what’s in RAM until you need more space to write to it.