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Mention that the default update time of 30 seconds may be

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changed with sysctl(8) by changing the kern.update variable.
Also make a couple of minor cosmetic changes.
This commit is contained in:
Mike Pritchard 1996-05-31 21:02:16 +00:00
parent 53df9ccfca
commit 7994d1fef8
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=16046
1 changed files with 10 additions and 4 deletions
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14
share/man/man4/update.4
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@ -37,7 +37,7 @@
.Os FreeBSD
.Sh NAME
.Nm update
.Nd flush internal filesystem caches to disk frequently
.Nd flush internal filesystem caches to disk periodically
.Sh SYNOPSIS
.Nm update
.Sh DESCRIPTION
@ -46,7 +46,12 @@ The
kernel process helps protect the integrity of disk volumes
by flushing
volatile cached filesystem data
to disk at thirty second intervals.
to disk. This is done at thirty second intervals by default.
The time period may be changed by using
.Xr sysctl 8
to modify the
.Va kern.update
variable.
The
.Nm update
process does the equivalent of the
@ -57,12 +62,13 @@ function call to do the task.
.Xr fsck 8 ,
.Xr init 8 ,
.Xr rc 8 ,
.Xr sync 8
.Xr sync 8 ,
.Xr sysctl 8
.Sh BUGS
It is possible on some systems that a
.Xr sync
occurring simultaneously with a crash may cause
file system damage. See
file system damage. See
.Xr fsck 8 .
.Sh HISTORY
An