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| author | kib <kib@FreeBSD.org> | 2010-10-16 09:46:03 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2010-10-16 09:46:03 +0000 |
| commit | 7a0ff2f8293078127f771f81a764b16cef4684a8 (patch) | |
| tree | 3b62f7183c79275f86723b8132ac2275836895e4 /share/man/man7 | |
| parent | 61f7905664175dc40eba88051c72cbfaec3e0c4c (diff) | |
| download | FreeBSD-src-7a0ff2f8293078127f771f81a764b16cef4684a8.zip FreeBSD-src-7a0ff2f8293078127f771f81a764b16cef4684a8.tar.gz | |
Document vfs.ncsizefactor and vfs.ncnegfactor.
MFC after: 2 weeks
Diffstat (limited to 'share/man/man7')
| -rw-r--r-- | share/man/man7/tuning.7 | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/share/man/man7/tuning.7 b/share/man/man7/tuning.7 index ccb69b6..76b3439 100644 --- a/share/man/man7/tuning.7 +++ b/share/man/man7/tuning.7 @@ -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 where the I/O load is such that 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 |
