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<p class="MsoNormal">What is the reconstruction application's resident (not the virtual) memory usage for the exclusive usage of a node?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">--------------------------------------------------<br>
Vardan H. Gyurjyan, Ph.D.<br>
Staff Scientist<br>
Thomas Jefferson Accelerator Facility<br>
Newport News, VA, 23606<br>
E-mail: gurjyan@jlab.org<br>
757-269-5879 (JLAB)<o:p></o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Clas12_software <clas12_software-bounces@jlab.org> on behalf of Nathan Baltzell via Clas12_software <clas12_software@jlab.org><br>
<b>Reply-To: </b>Nathan Baltzell <baltzell@jlab.org><br>
<b>Date: </b>Tuesday, February 7, 2023 at 11:05 AM<br>
<b>To: </b>clas12 software <clas12_software@jlab.org><br>
<b>Subject: </b>[Clas12_software] jlab batch job memory requests<o:p></o:p></span></p>
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<p class="MsoNormal">FYI Everyone, <o:p></o:p></p>
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<p class="MsoNormal">We've brought up memory efficiency of batch job requests at CLAS12 collaboration and software meetings in previous years. Lots of jobs requesting a lot more memory than they actually use can make the farm unnecessarily idle and significantly
reduce throughput for everyone.<o:p></o:p></p>
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<p class="MsoNormal">*** And now Scicomp has a larger initiative to improve farm efficiency, which includes contacting people running memory-inefficient jobs and potentially throttling their jobs if no action is taken. ***<o:p></o:p></p>
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<p class="MsoNormal">You can check metrics of your batch jobs at:<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://scicomp.jlab.org">https://scicomp.jlab.org</a> <o:p></o:p></p>
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<p class="MsoNormal">There's a search feature at 'Slurm Jobs' (left sidebar) -> 'Jobs Query' (top), and 'Recent Jobs' (top), and also 'Memory Efficiency' (top). <o:p></o:p></p>
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<p class="MsoNormal">Before launching a large number of new types of jobs, you can measure how much memory your jobs use. For example, by submitting a couple jobs and using that website, or by running your job interactively and checking in htop or ps or other
system utilities. And then set your SLURM/SWIF job memory request accordingly.<o:p></o:p></p>
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<p class="MsoNormal">Note, standard CLAS12 simulation jobs (gemc plus recon-util) require less than 1.7 GB of memory.<o:p></o:p></p>
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<p class="MsoNormal">-Nathan<o:p></o:p></p>
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