ffsbufs vs. bufs - tuning query

[Glenn Geers]

Hi,
	I'm using ESIX rev. D with only fast filesystems. I've cut back NBUFS
to 100 (despite the 200 min. in /etc/conf/cf.d/mtune - I changed the min. to 100) and increased the number of ffs buffers to 128 (I have 300 Mb on line - two
filesystems are 8192/1024 (sys V directory structure) and the other is
4096/1024 (BSD directory structure)). Performance does not appear to have 
suffered.

Is there any advantage in increasing the number of ffsbufs? When the system 
pages from the file system is the buffer cache bypassed (on BSD it is. 
Bach - The Design of The Unix System - doesn`t say or I might have missed it)?
If the cache is not bypassed which cache is used - the ffs one or the standard
one?

Thanks in advance,
	Glenn


--
___________________________________________________________________________
Glenn Geers                       | "So when it's over, 
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Department of Theoretical Physics |  Just to prove that human touch
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