[torqueusers] availmem

[Rudge, Chris M. (Dr.)]

Hi,

We're using torque version 2.4.7 (with Moab) and I'm trying to understand the value reported as "availmem" for nodes.

Reading the documentation here:
http://www.clusterresources.com/products/torque/docs/8.1monitoringresources.shtml#utilization
my understanding from this would be that availmem reports the unused physical RAM.

We have nodes with 12GB RAM and 24GB SWAP. If I look at the output from pbsnodes then I see:
physmem=12297836kb
totmem=35754824kb

which is what's I'd expect.

However, if I look at an idle node I see:
availmem=35370740kb
which clearly isn't a report of the physical memory.

Similarly, looking at a node where there's a process which reports a virtual size of 22GB and resident size of 11GB, I see:
availmem=11773424kb
which is the remaining physical + swap rather than just remaining physical which should be close to zero.

Have I misunderstood the documentation or are the numbers for availmem incorrect.

We're running Scientific Linux 5.4 (essentially RHEL 5.4).

Regards,
Chris



Dr Chris Rudge - Research Computing Services Manager

IT Services, University of Leicester, LE1 7RH
Tel:     +44 (0)116 2522223
emal:  chris.rudge at le.ac.uk