Subject: Re: Configuring a large buffer cache
To: Alex Nash <firstname.lastname@example.org>
From: Alasdair Baird <email@example.com>
Date: 11/18/1998 19:15:21
Hmmm, I think the problem that you will find with trying to get
a _useful_ large buffer cache is getting enough buffer headers.
As each buffer header requires a full 64k of VA space, and the
total allowed on the i386 is something like 7/10 of the available
KVA space, it is rather difficult to make full use of buckets
of memory for the cache...
I find I can only get about 2822 buffer headers on my system;
filling them all with 8k of data would only make use of 22M of
memory. A small difference between that and 256M?