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From: Tom Rhodes <trhodes@FreeBSD.org>
Date: Sat, 24 Jan 2009 01:46:46 +0000 (UTC)
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Subject: svn commit: r187661 - head/share/man/man7
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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