Re: Swap sizes? (was Re: [PLUG] recommendations?)

[Fred Forester <fforest@netcarrier.com>]

Not sure if this is still relevant but a while ago I read that
swap should be atleast ram * 2. This is because in the
event of a kernel panic where a core dump is produced the kernel will write

all of memory to the swap space prior to writing the file. The dump writer
does not
check the swap boundries and could potentially overwrite the partition
following the
swap space. So I usually go with at least 2 * ram and put the swap
partition at the
end of the drive if possible, I'v recently taken to using my old 540mb
drives as swap disks.


Fred


Kevin Brosius wrote:

> Erik Yunghans wrote:
> >
> > so maybe ill break it down like this:
> >
> > swap -> 512mb (256 mb of ram)
>
> This brings up a question from me.  This is the second time in the last
> week I've seem someone with a lot of memory (eg, more than 128M) suggest
> using a larger swap partition than their physical RAM.  The other
> message I read suggested 1G of swap on a machine with 128 or 256M of RAM
> (I forget which).
>
> Personally, I've never seen much of a need for swap once I hit 128M of
> RAM.  Of course, I only do some heavy compiling and no server type
> activity.  So the question I've got is, in what cases would you want to
> use 2x or 3x RAM if your desktop/workstation machine has 128 or 256M of
> RAM?  (Ignoring the fact that on a 30G drive you might not care about
> 500M of drive space...)
>
> --
> Kevin Brosius
>
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