partitioning HD for use of swap & for booting

Greg Lindahl lindahl at
Fri Jun 1 00:42:41 EDT 2001

On Thu, May 31, 2001 at 06:25:32PM -0400, Kent Heyward wrote:

> 2.    Does having a swap file contribute to performance?

Generally not. The object of swap is to not ever use it ;-)

> 3.    When I run linpack, I see in the beostatus monitor, the cpu usage
> go to 100% and the memory utilization on my 256k node move from 24% to
> 32%(59m to 80m)and never get any higher.  On another node with 128m, it
> will utilize 58 to 90 m.  It appears that adding more memory does not
> improve performance on the benchmark.

In order to get the highest linpack number, you want to increase the
size of the global array until it uses all the memory it can. Since
you have no swap, if you set this too large, the job will die.

-- g

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