On Tuesday, 16 October 2018 2:47:34 PM AEDT Bill Broadley wrote:
> AllowedSwapSpace=0
>
> So I expect jobs to not use swap. Turns out if I run a 3GB ram process with
> sbatch --mem=1000 I just get a process that uses 1GB ram and 2GB of swap.
That's intended. The manual page says:
AllowedSwapSpace=<number>
Constrain the job cgroup swap space to this percentage of the
allocated memory. The default value is 0, which means that
RAM+Swap will be limited to AllowedRAMSpace.
You probably want this as well:
MemorySwappiness=<number>
Configure the kernel's priority for swapping out anonymous pages
(such as program data) verses file cache pages for the job
cgroup. Valid values are between 0 and 100, inclusive. A
value of 0 prevents the kernel from swapping out program data.
cheers!
Chris
--
Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC
