Re: [Condor-users] memory and calculation time relationship

[David Brodbeck <brodbd@xxxxxx>]

That's going to depend entirely on the job; it all depends on how much information you have to keep in memory at one time.

Generally speaking if your job is already small enough to fit into the existing RAM, increasing it won't help.  (It may help slightly if you do a lot of I/O, due to more disk caching.)  On the other hand, if you're running out of RAM and swapping to disk, adding RAM may make things dramatically faster.

On Mon, Jul 18, 2011 at 4:03 AM, D.Yilmaz <d.yilmaz@xxxxxx> wrote:

If anyone knows memory and calculation time relationship in number crunching can he or she enlight us?
I wonder if I double the memory of a system how many percent total calculation time may drop?

--

David Brodbeck

System Administrator, Linguistics

University of Washington