Re: Q: Interesting memory usage stat's

[Stanislav Malyshev a.k.a Frodo]

NF>> 1) Why is memory usage so high when it shouldn't be?
NF>> Note: looking at the process that are running (most httpd), they don't
NF>> amount to much more that 30mb.

Actually, in ideal case memory usage should be 100%. Why you need memory
that isn't used? If it isn't used by the processes, OS could use it as
cache memory. However, I think it's very tough to make system that will
get close to 100% memory usage, especially in general case. However, if
the process configuration is static (i.e., same long-lived processes run
again and again doing the same stuff), memory usage could be close to it -
that means Linux is doing great job utilizing your memory. You should
start worrying about memory only if swap usage grows and running processes
start getting swapped - it easily leads to catastrophics thrashing and
loads about 20+, basically meaning the system is dead.

NF>> 2) How can I determine TRUE memory usage?

Well, take "used" number, take out "cached" and "buffers". That should be
close to it.

-- 
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