Problem with adding more swap !
jerrymc at clunix.cl.msu.edu
Tue Oct 14 06:47:16 PDT 2003
> Jerry McAllister <jerrymc at clunix.cl.msu.edu> writes:
> > Well, if you can spread it across multiple controllers, it can
> > speed things up.
> > But, generally I think that swap is used in
> > a serial manner, eg the first chunk gets used up before the
> > next one is started, etc.
> That's wrong. See the Handbook section titled "Swap Partition".
> > So, that would mean that you would
> > want to put only a little on the boot drive (you need some there
> > for special occasions) and most of the rest on another drive
> > and another controller if you can.
> Because FreeBSD tries to "stripe" the usage across all of the swap
> space, you're best off giving it space on all of the disks. However,
> if your disks are not all the same speed, you're better off sticking
> to the fastest ones for swap space.
Hmmm. Guess I am out of date on this part. Some older systems I
worked on (not necessarily FreeBSD) did not stripe swap. It's very
nice that FreeBSD does.
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