[torqueusers] remaining memory on a node

Andrus, Brian Contractor bdandrus at nps.edu
Fri Aug 12 12:58:05 MDT 2011


Ok. That is what is odd to me.

Pbsnodes is telling me:
status = rectime=1313175218,varattr=,jobs=141859.hamming2.local 141328.hamming2.local,state=free,netload=481480719018,gres=,loadave=0.01,ncpus=16,physmem=24676992kb,availmem=44749640kb,totmem=45159856kb,idletime=617965,nusers=0,nsessions=? 15201,sessions=? 15201,uname=Linux compute-8-33.local 2.6.18-194.17.1.el5 #1 SMP Wed Sep 29 12:50:31 EDT 2010 x86_64,opsys=linux

so 
physmem=24676992kb
 availmem=44749640kb

Wow... I have way more available than is physically in the system!???

>From the node itself:
[bdandrus at compute-8-33 ~]$ cat /proc/meminfo |grep MemTotal
MemTotal:     24676992 kB

So how does mom calculate this??


Brian Andrus
ITACS/Research Computing
Naval Postgraduate School
Monterey, California
voice: 831-656-6238


-----Original Message-----
From: torqueusers-bounces at supercluster.org [mailto:torqueusers-bounces at supercluster.org] On Behalf Of Gabe Turner
Sent: Friday, August 12, 2011 10:05 AM
To: Torque Users Mailing List
Subject: Re: [torqueusers] remaining memory on a node

On Fri, Aug 12, 2011 at 05:01:16PM +0000, Andrus, Brian Contractor wrote:
> All,
> 
> Is there a simple way to tell what torque/moab sees as unallocated memory on a node?
> 
> I have one node that someone is using, but not quite all the memory and not all the procs.
> When I try testing against it and do a qsub -I -l 
> nodes=1:gpus=1,pmem=1k I still get rejection due to memory... Seems odd.
> 

mdiag -n will tell you what Moab thinks the node has for memory, in MB.

pbsnodes <nodename> should tell you what torque thinks; see the 'availmem='
value.

-- 
Gabe Turner                                             gabe at msi.umn.edu
HPC Systems Administrator,
University of Minnesota
Supercomputing Institute                          http://www.msi.umn.edu
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