Subject: Re: IO buffer cache allocation
To: David Gilbert <firstname.lastname@example.org>
From: Luke Mewburn <email@example.com>
Date: 01/20/1996 15:18:26
David Gilbert writes:
> While I'm on the rampage of new kernel config lines, there are
> two things that I'd like to know how to change.
> Currently, I have 24 meg of memory in my Sun4/260. While I
> can accept that some machines with smaller amouns of memory may not
> want it --- I was always of the school that 10% of memory was a good
> number for the buffer cache in lieu of any better information.
> I would like a 10% buffer cache for my box. The default
> sseems to be along the lines of 5%.
I recently submitted a PR that modified machdep.c on the i386 port to
allow you to do
where xxx is a % of physmem to devote to bufcache. With a 16MB machine
I set it to 15% ;-)
The code would be trivial to incorporate into all other ports.
Hopefully the various port masters incorporate it, because until a
unified buffer cache is implemented (which obviates the need for this
option), it's a useful option.
Luke Mewburn <firstname.lastname@example.org>
"This is the central trick of the censor: to exaggerate the importance of the
challenging speech, to suppress it, and to deny the suppression."
-- `Guilty Secrets; Free Speech & Defamation in Australia', Roger Pullan