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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Comsol does not use all RAM available

Posted Jun 29, 2013, 3:27 p.m. EDT Studies & Solvers Version 4.3b 2 Replies

Fabio Greco
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Dear all,

running Comsol on my laptop, I see that it uses only 4-5 Gb of the available 16Gb RAM, and in fact it takes a very long time for simulation of time-dependent 3D problems. I don't have any other process running in the meanwhile.
I made sure to use the 64-bit version as well, but nothing change, again the available RAM is not fully exploited...

Thank you for any suggestion

Regards
--
Fabio
2 Replies Last Post Jun 30, 2013, 1:23 p.m. EDT
Jim Freels mechanical side of nuclear engineering, multiphysics analysis, COMSOL specialist
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Posted: 1 decade ago Jun 30, 2013, 12:10 p.m. EDT
Are you using windows ? If so, pop-up the task manager, and see what else may be using your memory. Also, see if your virtual memory is active and how much disk space is available for the virtual memory. You could adjust these so that the non-COMSOL applications can swap out to the virtual memory and give COMSOL more real RAM. My guess is that the OS is the culprit, and not COMSOL.
Are you using windows ? If so, pop-up the task manager, and see what else may be using your memory. Also, see if your virtual memory is active and how much disk space is available for the virtual memory. You could adjust these so that the non-COMSOL applications can swap out to the virtual memory and give COMSOL more real RAM. My guess is that the OS is the culprit, and not COMSOL.
Edgar J. Kaiser Certified Consultant
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Posted: 1 decade ago Jun 30, 2013, 1:23 p.m. EDT

Couldn't it simply be that the model doesn't need more RAM? Is the RAM usage increasing when you choose a finer mesh?

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Edgar J. Kaiser
www.emphys.com
Couldn't it simply be that the model doesn't need more RAM? Is the RAM usage increasing when you choose a finer mesh? -- Edgar J. Kaiser http://www.emphys.com

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