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Describe the syncer(4)-related sysctls kern.filedelay, kern.dirdelay

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and kern.metadelay, thanks to mckusick's feedback.
This commit is contained in:
Sheldon Hearn 2000-07-26 08:51:58 +00:00
parent 9516ffa7c0
commit 733144d91d
2 changed files with 16 additions and 6 deletions
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4
sbin/sysctl/sysctl.8
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@ -138,7 +138,9 @@ privilege can change the value.
.It kern.saved_ids integer no
.It kern.boottime struct no
.It kern.domainname string yes
.It kern.update integer yes
.It kern.filedelay integer yes
.It kern.dirdelay integer yes
.It kern.metadelay integer yes
.It kern.osreldate string no
.It kern.bootfile string yes
.It kern.corefile string yes

18
share/man/man4/syncer.4
View file

@ -53,14 +53,22 @@ the
.Nm
process forces a write out to disk of its dirty buffers.
.Pp
Usually,
buffers will be written out no more than
about 30 seconds
after they are dirtied.
The usual delay between the time buffers are dirtied
and the time they are synced
is controlled by the following
.Xr sysctl 8
tunable variables:
.Bl -column "filedelayXXXX" "DefaultXX" "DescriptionXX"
.It Em Variable Ta Em Default Ta Em Description
.It Va kern.filedelay Ta 30 Ta "time to delay syncing files"
.It Va kern.dirdelay Ta 29 Ta "time to delay syncing directories"
.It Va kern.metadelay Ta 28 Ta "time to delay syncing metadata"
.El
.Sh SEE ALSO
.Xr sync 2 ,
.Xr fsck 8 ,
.Xr sync 8
.Xr sync 8 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm