Re: swap usage

Rik van Riel (H.H.vanRiel@phys.uu.nl)
Wed, 24 Jun 1998 19:00:41 +0200 (CEST)


On Tue, 23 Jun 1998, Woody wrote:

> Hey guys....need a little help...I can't remember whether there is
> something I can do to help this little prob or if this is just kernel
> related, but, as I write this I am having trouble with mp3's being
> extremely choppy. I am running IRC, telnet, and I am copying a huge
> directory to another. The mpegs are really choppy....my question is this.

This is because the 2.0 kernels (and 2.1 too, to a certain extent)
have very poor I/O clustering. This is being worked on, but don't
expect it for another 6 months... (other projects have absolute
priority, see the Linux-MM homepage for more info)

> How can I get my system to use my Swap partition more often. Right now I
> have 80 meg worth of physical RAM and a 130 M swap with 58 M being cached.
> 77 M of physical is being used while only 96 K of swap is being used.
> That's right, K.....what can I do about this.

Upgrade your kernel to 2.1.101, 2.1.104 or 2.1.106 (these
kernels are in 'production' use and are known to function
rather well).
The 2.1 kernels have somewhat better I/O clustering and
readahead algorithms...

Btw, most people have complained about Linux using too
_much_ swap, while there was still so much cache memory
in use :)

Rik.
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