Subject: Re: Configuring a large buffer cache
To: Alasdair Baird <alasdair@wildcat.demon.co.uk>
From: Zdenek Salvet <salvet@ics.muni.cz>
List: port-i386
Date: 11/23/1998 15:43:42
> 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
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Try to lower MAXBSIZE in sys/param.h (unless you have
filesystems with 64k blocksize).

> 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...

-- 
Zdenek Salvet                                              salvet@ics.muni.cz 
Ustav vypocetni techniky Masarykovy univerzity, Brno
tel.: ++420-5-41 512 257                           Fax: ++420-5-41 212 747
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