Eric Lowe <[EMAIL PROTECTED]> wrote:
> On Mon, Jul 11, 2005 at 05:43:35AM -0700, Gerhard S. wrote:
> | > In particular you'll notice the paging code is
> | > really, really old and hasn't
> | > been touched significantly in a long time,
> |
> | Why is that? Does it work so well that nobody needs to touch it or is it so
> | fragile that nobody dares to touch it?
>
> These days, CPUs are SO fast compared to disk, that paging performance is
> pretty
> much unacceptable no matter how well it works -- plus, there is the fact
> that memory is cheaper to add than ever before. So this has never been seen
> as a priority, and is something most users haven't asked for (they just buy
> more RAM).
It is true that memory has become much cheaper now...
It is however not true that CPUs have become faster then disks.
During the past 20 years, the speed improvement of CPUs and disks has been
very similar.
CPUs have e.g. been too slow to do fast enough compression to beat disks
20 years ago and they still are not fast enough. The only diffrerence
between now and 20 years ago is that CPU speed now is more acceptable than
before.
Jörg
--
EMail:[EMAIL PROTECTED] (home) Jörg Schilling D-13353 Berlin
[EMAIL PROTECTED] (uni)
[EMAIL PROTECTED] (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/old/private/ ftp://ftp.berlios.de/pub/schily
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