Swap space - max size

T. Srikanth kantsg at netscape.net
Thu May 27 01:44:48 PDT 2004


Run the following script on your system under maximum load.

#!/bin/sh -

ps -o vsz -o rss | grep '[0123456789]' | \
awk '{
    i += $1;
    j += $2;
} END { printf("VSZ=%dK, RSS=%dK\n", i, j); }'

If you see VSZ is very close to the swap size and RSS is getting
closer to the available physical memory, you should have to tune
your system by increasing the swap. A process that is swapped out
is not necessarily swapped in immediately, so you can pick your
choice of the swap size that meets the requirements of VSZ (above).


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   Is there any point in adding more than 2 Gb of swap space on an x86 if
you have 2 Gb of ram? From what I've read, x86 can address 4 Gb of memory,
so it would seem that more than 4 Gigs of combined memory and swap space
would be wasted. Am I right?


    - Jamie

Greetings from Minneapolis, MN, United States

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