Red HAT AS3 memory issues

[Tolga Evren]

Hi,
 
This is normal behaviour. Linux tries to use all available memory as cache. Whenever free memory is 
needed  ,the os uses the memory which is reported as free . 
 
try to use :
 
sar -B to see whether page-in or out is happening 
 
sar -W to see swapping activity
 
/proc/meminfo and inact_dirty pages  to get detailed memory usage
 
sar -r  : to see swap , cache usage.
 
Regards,
tolga
 
 

________________________________

From: redhat-list-bounces at redhat.com on behalf of mac subbu
Sent: Sun 3/5/2006 3:48 AM
To: redhat-list at redhat.com
Subject: Red HAT AS3 memory issues



HI,

We have a linux AS3 on a server with 4 GB RAM

At any point of time my Free -m  Gives total of 4000 mb and used of  3900
and free 10 mb  but my buffers/cache used is hardly 1000 mb and 3000 mb free

  Whereas

   the top always gives

  mem used 4000 mb avg and used 3972

  Going by bufffers/cache i shudnt be having memory issues BUT our server is
monitored and keeps throwing above 80% memory utilisation all the time


  why is there a discrepancy between TOP and FREE and which shud be used
more definitely for memory analysis

  and why do we get over 80% used all the time when buffers/cache is low all
times

Any pointers would be appreciated

regards
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