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Tunable Kernel Parameters
HP-UX 11i Version 3: February 2007

Technical documentation

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acctsuspend, acctresume — suspend and resume accounting when available disk space reaches threshold





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)


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

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.


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 http://docs.hp.com.


acctsuspend and acctresume were developed by HP.



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