Re: Server Usable Memory
If you go by what free -m says, eg.
I've typically treated it as 1449 free here. 553 used. This is about what htop shows as "green" as well. I think you can read it as,
total used free shared buffers cached
Mem: 2003 1862 140 0 45 1264
-/+ buffers/cache: 553 1449
Swap: 0 0 0
1862 is in use but cache is using 1264 and buffer 45 and those could be released when really needed leaving 553 really, really in use. Of course, releasing buffers may cause some problems and having no cache is bound to slow down a lot of stuff too. So I don't think you'd be wise to force that depth of purge.
If you look at /proc/meminfo I think it is the two (anon) lines that are critical. I could be wrong but I read it as those pages of memory cannot be reloaded from a known source. They seem to add up to about the right value too.
Last edited by BkkBonanza; July 27th, 2012 at 11:53 AM.
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