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I don't know a great deal about memory usage but I'm struggling to
understand this. On my VPS memory usage is typically between 65-95%.
This is fine as its there to be used but I do get concerned when it
reaches the 90%+ region for periods.
Another thing I don't really understand is that none of it is buffered
or cached. Here's the output of "free -m":
total used free shared buffers cached
Mem: 960 807 152 0 0 0
-/+ buffers/cache: 807 152
Swap: 0 0 0
Can anyone explain if this high usage is OK? I have around 20 websites
on this Ubuntu VPS including mail. Amavis, Clam, Apache and MySQL are
taking the majority.
Cheers
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