Tunable Kernel Parameters
NAME [Toc] [Back]
acctsuspend, acctresume - suspend and resume accounting when available
disk space reaches threshold
VALUES [Toc] [Back]
Default [Toc] [Back]
Allowed values [Toc] [Back]
acctresume: -100 - 101
acctsuspend: -100 - acctresume-1
Recommended values [Toc] [Back]
acctsuspend: 2 - 6
acctresume: 4 - 10 (But more than acctsuspend)
DESCRIPTION [Toc] [Back]
The acctsuspend and acctresume tunables control when accounting stops
and resumes due to disk space constraints. When free disk space on
the file system being used by accounting reaches the suspension
threshold, which is the acctsuspend percentage relative to the
percentage of disk space available only to the superuser, accounting
is suspended until such time as the free disk space reaches the
resumption threshold, which is the acctresume percentage relative to
the percentage of disk space available only to the superuser.
Note: Since the acctsuspend and acctresume values are specified
relative to the percentage of disk space available only to the
superuser, negative values of these parameters can make sense.
For example, if the superuser has reserved 10 percent of the disk
space on the file system at file system creation time, and
acctsuspend is -5 and acctresume is 0, the suspension threshold
will be 5 percent of the total disk space and the resumption
threshold will be 10 percent of the total disk space.
Who Is Expected to Change This Tunable?
Anyone using accounting.
Restrictions on Changing [Toc] [Back]
Changes to this tunable take effect at the next reboot.
When Should the Value of This Tunable Be Raised?
Increasing either variable should be considered when it is necessary
to maintain a higher percentage of free space on the accounting
Hewlett-Packard Company - 1 - HP-UX 11i Version 2: Sep 2004
Tunable Kernel Parameters
What Are the Side Effects of Raising the Value of This Tunable?
The higher either value is, the less accounting data may be captured.
The further the values are separated, the greater the amount of
potentially lost accounting data.
When Should the Value of This Tunable Be Lowered?
If additional disk space is needed for accounting data, and it cannot
be obtained by moving files off of the filesystem, then the value of
acctsuspend should be lowered.
What Are the Side Effects of Lowering the Value of This Tunable?
Filesystem performance (writing accounting records) decreases as the
filesystem fills up. In turn, this will decrease the overall
performance of accounting processes.
What Other Tunables Should Be Changed at the Same Time?
When changing either of these tunables, both should be considered.
WARNINGS [Toc] [Back]
All HP-UX kernel tunable parameters are release specific. This
parameter may be removed or have its meaning changed in future
releases of HP-UX.
Installation of optional kernel software, from HP or other vendors,
may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended
values. For information about the effects of installation on tunable
values, consult the documentation for the kernel software being
installed. For information about optional kernel software that was
factory installed on your system, see HP-UX Release Notes at
AUTHOR [Toc] [Back]
acctsuspend and acctresume were developed by HP.
SEE ALSO [Toc] [Back]
Hewlett-Packard Company - 2 - HP-UX 11i Version 2: Sep 2004 [ Back ]