[slurm-users] maxRSS and aveRSS

xiaojinghu93 at 163.com xiaojinghu93 at 163.com
Tue Mar 9 08:41:07 UTC 2021

Hi guys,
I would like to calculate the CPU efficiency and Memory efficiency of slurm jobs. 

I am having difficulty calculating the real “memory” a job use. 
According to slurm, “maxRSS” means "Maximum resident set size of all tasks in job”. If so, how can I get the memory used by a single job?  As far as I am concerned, if I need to know the memory used by a single job/jobstep, I need to sum up the memory used for each task. So I think  I should use the “aveRSS” field which gives the "average resident set size of all tasks in job”. If I multiply the “aveRSS” with “task”, I should get the real memory a job/jobstep used.

But I studied the code of the “seff” command and it claims to be equivalent to "sacct -P -n -a --format JobID,User,Group,State,Cluster,AllocCPUS,REQMEM,TotalCPU,Elapsed,MaxRSS,ExitCode,NNodes,NTasks -j <job_id>”, which means I should use “maxRSS”.

Can anyone give me some explanation on that?

Very grateful for any help.
Thank you!


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