Date: Thu, 30 May 1996 17:20:36 -0700 (PDT) From: Peter Wemm <peter> To: CVS-committers, cvs-all, cvs-sys Subject: cvs commit: src/sys/kern vfs_subr.c src/sys/sys vnode.h src/sys/conf options param.c src/sys/i386/conf LINT Message-ID: <199605310020.RAA21198@freefall.freebsd.org>
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peter 96/05/30 17:20:35
Modified: sys/conf options param.c
sys/kern vfs_subr.c
sys/sys vnode.h
sys/i386/conf LINT
Log:
Add an option "EXTRA_VNODES" to cause an extra number of vnode structures
to be allocated at boot time. This is an expensive option, as they
consume physical ram and are not pageable etc. In certain situations,
this kind of option is quite useful, especially for news servers that
access a large number of directories at random and torture the name cache.
Defining 5000 or 10000 extra vnodes should cut down the amount of vnode
recycling somewhat, which should allow better name and directory caching
etc.
This is a "your mileage may vary" option, with no real indication of
what works best for your machine except trial and error. Too many will
cost you ram that you could otherwise use for disk buffers etc.
This is based on something John Dyson mentioned to me a while ago.
Revision Changes Path
1.13 +2 -1 src/sys/conf/options
1.20 +6 -1 src/sys/conf/param.c
1.54 +2 -2 src/sys/kern/vfs_subr.c
1.33 +2 -1 src/sys/sys/vnode.h
1.260 +12 -2 src/sys/i386/conf/LINT
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