Re: [HTCondor-users] Periodic Hold for jobs exceeding memory and CPU requests

[Thomas Hartmann <thomas.hartmann@xxxxxxx>]

Hi David,

I personally do not worry too much about core request and usage. With 
cgroups in use, a job trying to use more CPU than requested, it should 
be confined to the assigned weightened CPU time share.
E.g., a job requesting 2 cores on a 48 core host should get ~4% of the 
overall CPU time - even when trying to sneak in a `make -j 48`

Cheers,
  Thomas

On 24/02/2021 13.31, David Cohen wrote:
> Hi,
> I was under the, apparently wrong, impression that setting
> CGROUP_MEMORY_LIMIT_POLICY = HARD
> will suffice to kill jobs running over the requested memory.
> I now understand that I have to back it up by a SYSTEM_PERIODIC_HOLD
> As the system is in production I don't want to risk getting it wrong and 
> killing innocent jobs.
>
> While I'm at it can I also use that method to remove jobs that are using 
> more cores than requested (cpu usage > cpu requested)?
>
> Thanks,
> David
>
>
>
>
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