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Add a comment on kern.ipc.maxpipekva.

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PR:		105997
Reviewed by:	keramida
This commit is contained in:
Tom Rhodes 2009-01-24 01:46:46 +00:00
parent 8a7ef10b71
commit 7fa8a57130
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=187661
1 changed files with 11 additions and 1 deletions
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12
share/man/man7/tuning.7
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@ -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 ones that have the greatest effect
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