acctsuspend.5 (2010 09)

a
acctsuspend(5) acctsuspend(5)
(Tunable Kernel Parameters)
NAME
acctsuspend, acctresume - suspend and resume accounting when available disk space reaches threshold
VALUES
Failsafe
Default.
Default
acctsuspend:
2
acctresume: 4
Allowed values
acctresume: -100 - 101
acctsuspend: -100 - acctresume-1
Recommended values
acctsuspend: 2-6
acctresume: 4-10(But more than acctsuspend)
DESCRIPTION
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 suspen-
sion 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 resump-
tion 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
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 filesystem.
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
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.
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1