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I’ve suspected for some time that this matters in our environment, though we /do/ use GPFS. Maybe any use of local scratch (XFS, local drive) could figure in here?
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<div>Are there any tips for how to determine easily where the extra money is coming from, for example when the user has specifically constrained application to a certain amount of memory with its own flags, or – to put another way – to prove that it’s not this
sort of phenomenon happening?<br>
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<div dir="ltr">On Jun 21, 2019, at 13:04, Christopher Samuel <<a href="mailto:chris@csamuel.org">chris@csamuel.org</a>> wrote:<br>
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<div dir="ltr"><span>On 6/13/19 5:27 PM, Kilian Cavalotti wrote:</span><br>
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<blockquote type="cite"><span>I would take a look at the various *KmemSpace options in cgroups.conf,</span><br>
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<blockquote type="cite"><span>they can certainly help with this.</span><br>
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<span>Specifically I think you'll want:</span><br>
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<span>ConstrainKmemSpace=no</span><br>
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<span>to fix this. This happens for NFS and Lustre based systems, I don't think it's a problem for GPFS as mmfsd has its own pagepool separate to the processes address space.</span><br>
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<span>All the best,</span><br>
<span>Chris</span><br>
<span>-- </span><br>
<span> Chris Samuel : <a href="http://www.csamuel.org/">http://www.csamuel.org/</a> : Berkeley, CA, USA</span><br>
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