Date: Sat, 16 Oct 2010 09:46:03 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r213917 - head/share/man/man7 Message-ID: <201010160946.o9G9k3FC069569@svn.freebsd.org>
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Author: kib Date: Sat Oct 16 09:46:03 2010 New Revision: 213917 URL: http://svn.freebsd.org/changeset/base/213917 Log: Document vfs.ncsizefactor and vfs.ncnegfactor. MFC after: 2 weeks Modified: head/share/man/man7/tuning.7 Modified: head/share/man/man7/tuning.7 ============================================================================== --- head/share/man/man7/tuning.7 Sat Oct 16 09:44:31 2010 (r213916) +++ head/share/man/man7/tuning.7 Sat Oct 16 09:46:03 2010 (r213917) @@ -23,7 +23,7 @@ .\" .\" $FreeBSD$ .\" -.Dd August 11, 2010 +.Dd October 16, 2010 .Dt TUNING 7 .Os .Sh NAME @@ -534,6 +534,24 @@ It may be tuned down in specific cases w read-ahead adversely affects performance or where system memory is really low. .Pp +The +.Va vfs.ncsizefactor +sysctl defines how large VFS namecache may grow. +The number of currently allocated entries in namecache is provided by +.Va debug.numcache +sysctl and the condition +debug.numcache < kern.maxvnodes * vfs.ncsizefactor +is adhered to. +.Pp +The +.Va vfs.ncnegfactor +sysctl defines how many negative entries VFS namecache is allowed to create. +The number of currently allocated negative entries is provided by +.Va debug.numneg +sysctl and the condition +vfs.ncnegfactor * debug.numneg < debug.numcache +is adhered to. +.Pp There are various other buffer-cache and VM page cache related sysctls. We do not recommend modifying these values. As of
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