On Sun, Nov 24, 2002 at 05:27:56PM -0600, steve rader wrote:
>
> The "free" command reports real memory util as
> used, shared, buffers and cached. But what are the
> definitions of the terms? There's no mention of them
> in the man pages for free, top, or vmstat.
It also reports swap, but you're on the right track.
> It's been about a dozen years since I got my BS in
> CompSci, but my recollection is...
>
> used is used by user-space processes
> shared is used for shared memory segments
No longer accurate, according to the man page.
> buffers is used for kernel network and streams buffering
> cached is used for file system caching
Your memory is correct.
You might prefer to refer directly to /proc/meminfo, to wit:
$ cat /proc/meminfo
total: used: free: shared: buffers: cached:
Mem: 262963200 236924928 26038272 0 27144192 113356800
Swap: 789585920 221184 789364736
MemTotal: 256800 kB
MemFree: 25428 kB
MemShared: 0 kB
Buffers: 26508 kB
Cached: 110484 kB
SwapCached: 216 kB
Active: 127024 kB
Inactive: 81024 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 256800 kB
LowFree: 25428 kB
SwapTotal: 771080 kB
SwapFree: 770864 kB
Kurt
--
The man who sets out to carry a cat by its tail learns something that
will always be useful and which never will grow dim or doubtful.
-- Mark Twain.
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