by cferran » Thu, 18 Apr 2002 00:48:59
We are running an ArcServ agent on 2 AIX servers (4.3.3)with the
ArcServ 6.x running on n/t. When the n/t backup runs against the AIX
servers, it consumes nearly 99% of physical memory on each server. It
doesnt matter whether it is 1gb or 4 gb of memory. It will not release
this memory when the job finishes. The only way to recover this is to
reboot each box.
Arcserv tech support says its not their problem.
Has anyone seen this b4?
by Tao Che » Sat, 20 Apr 2002 14:54:10
As long as number of free memory pages is above 'minfree' (see vmtune command),
AIX keeps allocating free memory for computation or file cache (in this case),
unless you turn on strict maxperm.
And file cache pages dont' go away until files are removed of umounted.
If you don't understand what I say, go look at 'vmtune' command and
read AIX Performance Tuning Guide.
> We are running an ArcServ agent on 2 AIX servers (4.3.3)with the
> ArcServ 6.x running on n/t. When the n/t backup runs against the AIX
> servers, it consumes nearly 99% of physical memory on each server. It
> doesnt matter whether it is 1gb or 4 gb of memory. It will not release
> this memory when the job finishes. The only way to recover this is to
> reboot each box.
> Arcserv tech support says its not their problem.
> Has anyone seen this b4?
by Tao Che » Sat, 20 Apr 2002 14:58:40
Warning: read Performance Tuning Guide or ask AIX perf expert
before change VMM tunables with vmtune.
/user/samples/kernel/vmtune
bos.adt.samples
> As long as number of free memory pages is above 'minfree' (see vmtune command),
> AIX keeps allocating free memory for computation or file cache (in this case),
> unless you turn on strict maxperm.
> And file cache pages dont' go away until files are removed of umounted.
> If you don't understand what I say, go look at 'vmtune' command and
> read AIX Performance Tuning Guide.
1. Memory use: which process is consuming it all?
I'm running Slackware 2.0.0, and am finding that ~9 megs of memory are
already used when I boot up. When I run X and Netscape, that has gone up
to 30 megs. (These numbers come from 'free'.) Is this normal? (It
sounds way too high to me!) Also, if it _is_ true, why doesn't the memory
usage show upusing ps -amp (all processes + memory info)
eg: right now free gives
total used free shared buffers cached
Mem: 30892 30380 512 21988 1428 12668
-/+ buffers: 16284 14608
Swap: 34268 0 34268
and ps -amp only lists X and Netscape as using over 1 meg (1.4 and 2.6
respectively). The cache setting in Netscae is set to 3 meg, so it
shouldn't be the problem. Any ideas/hints would be most appreciated!
Thanks in advance,
Alan Ableson
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