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Memory requirement

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Hi Comsol Users

I have been working on a 3D modeling of a machine with the 'Magnetic Field' physics.

The model has 2765902 DoFs. And I am working on a computer with 8 GB RAM.

What do you think? Will it work? or Do I need more RAM?

1 Reply Last Post 19 déc. 2011, 01:47 UTC−5
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)

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Posted: 1 decade ago 19 déc. 2011, 01:47 UTC−5
Hi

it's probably a bit short, but the easiest is to try, you can monitor the RAM use by external tools (I use Sysinernals processexplorer) , and by observing the COMSOL line (bottom frame border), my way is to leave it go if I can come to 80% of the solver step and still be within my RAM size, a little swapping is supportable, even if it slows down the solving by an order of magnitude. The most I have done was 60% more RAM engaged than what I had readily, it took an extra hour or two.

Often the PC becomes responsless, when swapping, so I bever run on all my CPU's to be sure at least one can give me some response to kill the process, and I launch the task manager before all RAM is in use

--
Good luck
Ivar
Hi it's probably a bit short, but the easiest is to try, you can monitor the RAM use by external tools (I use Sysinernals processexplorer) , and by observing the COMSOL line (bottom frame border), my way is to leave it go if I can come to 80% of the solver step and still be within my RAM size, a little swapping is supportable, even if it slows down the solving by an order of magnitude. The most I have done was 60% more RAM engaged than what I had readily, it took an extra hour or two. Often the PC becomes responsless, when swapping, so I bever run on all my CPU's to be sure at least one can give me some response to kill the process, and I launch the task manager before all RAM is in use -- Good luck Ivar

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