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STRMSGSZ(5)							   STRMSGSZ(5)

NAME
       STRMSGSZ - maximum size of streams message data (bytes)

VALUES
   Failsafe
   Default
   Allowed values
   Recommended values
DESCRIPTION
       This  tunable  limits  the  number of bytes of message data that can be
       inserted by or in the data portion of any streams message on  the  sys‐
       tem.   If  the  tunable	is  set to zero, there is no limit on how many
       bytes can be placed in the data segment of the message.

       returns if the buffer being sent is larger than the  current  value  of
       segments the data into multiple messages.

   Who Is Expected to Change This Tunable?
       Any customer.

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

   When Should the Value of This Tunable Be Raised?
       The  tunable  should  be	 increased  by	any customer if the customer's
       STREAMS module/driver(s) require a longer message size in the data por‐
       tion than the current value.

   What Are the Side Effects of Raising the Value of This Tunable?
       The  kernel will use more memory.  During low memory situations, it may
       bring down system performance due to frequent swapping.

   When Should the Value of This Tunable Be Lowered?
       The tunable could be lowered by any customer if the customer's  STREAMS
       module/driver(s)	 do not require a longer message size in the data por‐
       tion than the current value.

   What Are the Side Effects of Lowering the Value of This Tunable?
       Possible improper functioning in any of the  STREAMS  module/driver(s).
       Possible performance degradation, particularly in networking.

   What Other Tunable Should Be Changed at the Same Time as This One?
       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		   STRMSGSZ(5)

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