diskaudit_flush_interval man page on HP-UX

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diskaudit_flush_interval(5)			   diskaudit_flush_interval(5)

       diskaudit_flush_interval - determine time interval (in secs) for flush‐
       ing audit records

   Allowed values
   Recommended values
       The tunable controls the	 periodic  interval  between  two  consecutive
       flushes	of  audit records buffered in the kernel memory which is bound
       to a kernel thread.  This kernel thread has 64KB of buffer size to hold
       the  audit  records,  and  there	 can  be a maximum of 32 such threads.
       These kernel threads automatically flush their buffers if  the  buffers
       fill  up completely, but that might take a long time depending upon the
       activities in the system.

       The value of the tunable should be  set	such  that  the	 threads  keep
       cleaning	 their	buffers	 when they are approximately half full, or are
       idle for a long time but still holding some data in the buffer.	 Keep‐
       ing  the tunable value too low will make threads flush too soon and may
       lead to too many small write operations,	 thus  impacting  performance.
       On  the	other  hand,  keeping  the  value  too high might lead to high
       unflushed memory consumption.

   Who Is Expected to Change This Tunable?
       An administrator with proper privileges can change the value of

   Restrictions on Changing
       None.  This tunable is dynamic.

   When Should the Value of This Tunable Be Raised?
       When the system is not processing many audit-related activities.

   What are the Side Effects of Raising the Value?
       If the system is generating large numbers of records, and the value  is
       raised, then it can result in a lot of unflushed memory, and might slow
       down the system.

   When Should the Value of This Tunable Be Lowered?
       When the system is generating a lot of audit records.

   What are the Side Effects of Lowering the Value?
       If the system is not generating too many records, and the value is low‐
       ered, it might lead to a lot of small numbers of writes, which actually
       only write to buffer cache and not immediately to  the  physical	 disk,
       with  the  actual  write happening later on.  This might impact perfor‐
       mance again.

   What Other Tunable Values Should Be Changed at the Same Time?

       All HP-UX kernel tunable parameters are release specific.  This parame‐
       ter  may	 be  removed or have its meaning changed in future releases of

       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  val‐
       ues.  For information about the effects of installation on tunable val‐
       ues, consult the documentation for the kernel software being installed.
       For  information	 about	optional  kernel  software  that  was  factory
       installed on your system, see at

       was developed by HP.


			   Tunable Kernel Parameterdiskaudit_flush_interval(5)

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