swap or not?

[Galen Arnold]

I'm looking for some opinions (based on real cluster setups would be nice 
too).  If you've got nodes with lots of memory (>1GB) do you run with swap 
space configured or not?

We're seeing the occasional run that misses its memory request by a lot 
and it hangs nodes due to excessive paging.  

-Galen

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Galen Arnold, system engineer--consulting group    arnoldg at ncsa.uiuc.edu
National Center for Supercomputing Applications           (217) 244-3473
152 Computer Applications Bldg., 605 E. Spfld. Ave., Champaign, IL 61820