On Sun, Jan 22, 2006 at 06:32:27PM -0700, Brian Wood wrote:
> On Jan 22, 2006, at 6:03 PM, Trey Boudreau wrote:
> >
> > As to RAM, you'd do well to follow my First Law of Computing:
> >
> >   Thou shalt not swap.
> 
> Perhaps, but if you find yourself with unused RAM you could always  
> use it as ramdisks for your oft-accessed data.
>
In general, the Linux VM subsystem does an outstanding job of caching.
Taking RAM away from it and dedicating it to a RAM disk will almost
always result in lower overall performance because it tracks what you
actually use as opposed to what you think you'll use.

> I guess when you got to where you were never waiting on disk access
> you would be happy, and broke.
>
A useful rule of thumb says that you can buy the same compute hardware
cheaper next week (or next month).  If you wait 18 months (a la Mr.
Moore), you'll only end up half broke ;-)

-- Trey
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