Subject: Re: Configuring a large buffer cache
To: Alex Nash <>
From: Alasdair Baird <>
List: port-i386
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?