On 12/17/2012 11:19 PM, AshikAli.m wrote:
> [root@machine1 ~]# free -m
> total used free shared buffers cached
> Mem: 32183 1309 30873 0 290 485
> -/+ buffers/cache: 533 31649
> Swap: 51199 0 51199
so you have about 32gb total physical memory. 1.3gb of that is 'used'
but of that 290MB is buffers and 485MB is cache, so really only 533MB
(the 2nd line) is in use by software, and 31649MB is available (which is
the 30873 free on the 1st line, plus the 290 buffers plus the 485
cached, as all that is considered 'discardable' [*].
you also have 51199MB of swapfile, entirely unused.
this looks to me like a system that was just booted, and hasn't done much.
[*] under heavy loads, like a buay large scale database server, this sum
isn't exactly true, some of the buffer memory is 'dirty' so not
considered as free without first flushing it to disk...
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