svn commit: r187661 - head/share/man/man7
Tom Rhodes
trhodes at FreeBSD.org
Fri Jan 23 17:46:48 PST 2009
Author: trhodes
Date: Sat Jan 24 01:46:46 2009
New Revision: 187661
URL: http://svn.freebsd.org/changeset/base/187661
Log:
Add a comment on kern.ipc.maxpipekva.
PR: 105997
Reviewed by: keramida
Modified:
head/share/man/man7/tuning.7
Modified: head/share/man/man7/tuning.7
==============================================================================
--- head/share/man/man7/tuning.7 Sat Jan 24 01:34:22 2009 (r187660)
+++ head/share/man/man7/tuning.7 Sat Jan 24 01:46:46 2009 (r187661)
@@ -23,7 +23,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd November 19, 2007
+.Dd January 23, 2009
.Dt TUNING 7
.Os
.Sh NAME
@@ -402,6 +402,16 @@ In this document we will only cover the
on the system.
.Pp
The
+.Va kern.ipc.maxpipekva
+loader tunable is used to set a hard limit on the amount of pageable
+address space available.
+This value is auto tuned by the system, but may require manual tuning
+in a few rare cases.
+Increasing this value to a higher setting, such as `25165824' might
+improve performance on systems where pageable address space is
+quickly exhausted.
+.Pp
+The
.Va kern.ipc.shm_use_phys
sysctl defaults to 0 (off) and may be set to 0 (off) or 1 (on).
Setting
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