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nswapfs(5)							    nswapfs(5)

NAME
       nswapfs - maximum number of file systems that can be enabled for swap

VALUES
   Default
   Allowed values
DESCRIPTION
       File  system swap devices are managed in a table for easier indexing in
       the kernel.  sets the kernel variable responsible for the  upper	 limit
       on  this	 table,	 and thus the upper limit to file systems which can be
       used for swap.

   Who is Expected to Change This Tunable?
       Anyone.

   Restrictions on Changing
       Changes to this tunable take effect at the next reboot.

   When Should the Value of This Tunable Be Raised?
       If another file system swap is added to the system which would increase
       the  number  above  then	 returns to the caller (see the swapon(2) man‐
       page).

   What Are the Side Effects of Raising the Value?
       More file systems for swap can be added to the system, and  the	kernel
       will need a little more memory for the table.  A small performance side
       effect of the kernel having to scan more file systems to	 check	for  a
       duplicate during swapon is also true, but realistically negligible.

   When Should the Value of This Tunable Be Lowered?
       Only  if you are sure the system will never go over a certain number of
       swap file systems, and you wish to lower this tunable to save  a	 small
       amount  of  kernel  memory  and kernel performance during swapon opera‐
       tions.

   What Are the Side Effects of Lowering the Value?
       No side effects other than the primary and presumably desired new limi‐
       tation on the number of swap file systems.

   What Other Tunable Values Should Be Changed at the Same Time?
       None.

WARNINGS
       All HP-UX kernel tunable parameters are release specific.  This parame‐
       ter 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 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

AUTHOR
       was developed by HP.

			   Tunable Kernel Parameters		    nswapfs(5)

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