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<pre style="margin-top:14pt;margin-bottom:14pt;"><span style="font-family: Calibri, Helvetica, sans-serif;">Dear "Commiserates"</span><span style="font-family: Calibri, Helvetica, sans-serif;">.
I wonder a bit about the meaning of MaxRSS. The documentation says:
"Maximum resident set size of all tasks in job."
To what refers here "maximum"? The maximum over job period, I understand </span><span style="font-family: Calibri, Helvetica, sans-serif;">hopefully correctly. But it does not seem to be the size of all tasks (summed up, so-to-speak), but the maximum size of RSS of that task with the largest RSS </span><span style="font-family: Calibri, Helvetica, sans-serif;">of all tasks during the job's period. Right?
In any case, I observed something like this:
login08:~> sacct -j 2408392 -o 'maxrss,maxrssnode%20'
MaxRSS MaxRSSNode
---------- --------------------
102124920K i02r09c03s02
... so 102 GB if I counted the decimal positions correctly. On the other hand, for specifically this node, I actually only have
i02r09c03s02:~> cat /proc/meminfo
MemTotal: 98436736 kB
i.e. 98 GB RAM ...
Does anybody know whether</span><span style="font-family: Calibri, Helvetica, sans-serif;"> there is a reasonable explanation how this can be? Specifically is the situation even </span><span style="font-family: Calibri, Helvetica, sans-serif;">worse, if MaxRSS is the maximum RSS of only one task (rank) on that node. What about the other tasks (which certainly also consume memory). And also the OS is </span><span style="font-family: Calibri, Helvetica, sans-serif;">quite large on these disk-less compute nodes.
Would be nice if you could share any ideas about my finding. Thank you!
Kind regards,
Martin</span></pre>
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