Todd Young wrote:

>I read somewhere that your swap space should be double your RAM up to 
>512MB, but I can't remember if that meant up to 512MB of RAM or 512MB of 
>swap.

Rules of thumb like this are helpful, but a better way to determine
optimal swap space size is to put a system under the expected load and
check free space to see how much swap space is being used.  Add a bit
more to the maximum swap space used (when not thrashing - it will be
hard to thrash a system with 512MB RAM).

Back to rules of thumb for swap space size.  It depends on the
application, but the following is what I generally use;

RAM Size     Swap size
4-128 MB     Double RAM size
256-512 MB   Same as RAM size
1GB and up   512MB - 1GB

>But back to my original question. I'm thinking a Gig of swap is way 
>overkill. I was thinking 768MB max.

In many cases, 256MB would be fine for any size RAM.

You could start with 256MB swap space and add swap partitions as needed.
However, keep in mind that modern hard drives have about twice the
performance on the outer cylinders than the inner cylinders, so try to
position swap space near the beginning of the drive for better swapping
performance.  Swap should also be close to often used filesystems.  Best
yet, is put swap on its own drive.

For your system, I'd use a 512MB swap partition.

>Opinions? (Let's keep this civil please.)

Dual PII-400 system with 512MB ECC RAM is a fantastic system!  Who
originally built this system?  Is it a particular brand or custom made?
Very cool system!

Sincerely,

Ken Fuchs <kfuchs at winternet.com>

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