[slurm-users] Small FreeMem is reported by scontrol

[Mahmood Naderan]

>Memory may be being used by jobs running, or tasks outside the control of
>Slurm running, or possibly NFS buffer cache or similar.  You may need to
>start an ssh session on the node and look.


I checked that. For example, on compute-0-1, I see
    RealMemory=120705 AllocMem=1024 FreeMem=8442 Sockets=32 Boards=1

I then connected to the node and ran "top"

    KiB Mem : 12360248+total,  8623376 free,  5197452 used,
10978166+buff/cache

I then ran

    sync; echo 3 > /proc/sys/vm/drop_caches

While "top" shows the caches are deleted

    KiB Mem : 12360248+total, 11805062+free,  5202876 used,   348992
buff/cache


Still scontrol shows the same as before

   RealMemory=120705 AllocMem=1024 FreeMem=8426 Sockets=32 Boards=1


Regards,
Mahmood
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.schedmd.com/pipermail/slurm-users/attachments/20191216/6a30eefd/attachment-0001.htm>