Memory Limits [IT-Bereich des Instituts für Chemie]

Diese Seite ist nicht editierbar. Sie können den Quelltext sehen, jedoch nicht verändern. Kontaktieren Sie den Administrator, wenn Sie glauben, dass hier ein Fehler vorliegt.

====== Memory Limits ======


===== Type of Memory Limits =====

  - Resident memory (RSS): amount real memory in use by process
  - Virtual memory (VMem): amount of virtual memory pages allocated by process
  - In the current cluster setup, only the limit for the real memory has to be taken into consideration for jobs (by parameter <html>--mem</html>).
\\
===== Properly setting Memory Limits =====

  - The demands of your jobs for real memory (RSS) have to be carefully probed (e. g. doing test runs or or by experience ;-)) and defined.
  - If possible, please declare memory limits within the main input (control) file of your job (e. g. <html> <span style="font-family:courier;font-size:130%">Gaussian</span> knows about the parameter <span style="font-family:courier;font-size:130%">%mem=</span></span></html>).
  - SLURM defines a proportional factor between RSS and Vmem: ''VSizeFactor*RSS = VMem''.
  - VMem limit (VSizeFactor=0) has not to be taken into consideration.
  - <del>RSS limit: ''RSS = VMem limit''/''$(scontrol show config|grep VSizeFactor|awk '{print $3;}')''  and then passing via switch ''--mem='' to sbatch.</del>


\\
<WRAP rightalign>
date of revision: 06-24-2019 © kraus
</WRAP>