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nstrpty(5)							    nstrpty(5)

NAME
       nstrpty - maximum number of STREAMS-based pseudo terminals (pts)

VALUES
   Default
   Allowed Values
DESCRIPTION
       is  the	number	of  STREAMS-based pseudo terminal (pts) drivers that a
       system can support.  The pty driver provides support for a  device-pair
       called  a  pseudo  terminal.   A pseudo terminal is a pair of character
       devices, a master device, and a slave device.  These  allow  communica‐
       tion between an application process and a server process.  When sending
       data to pty devices (such as  windows), a pty  device  must  exist  for
       every window that is open at any given time.

       should  be set to a value that is equal to, or greater than, the number
       of pty devices on the system  that  will	 be  using  STREAMS-based  I/O
       pipes.  Using a parameter value significantly larger than the number of
       ptys is not recommended.	 is used when creating data structures in  the
       kernel  to  support  STREAMS-based ptys, and an excessively large value
       wastes kernel memory space.

   Who Is Expected to Change This Tunable?
       Users with the privilege.  See privileges(5) for more information about
       privileged access on systems that support fine-grained privileges.

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

   When Should the Value of This Tunable Be Raised?
       This tunable value needs to be raised when the system runs out of ptys.

   What Are the Side Effects of Raising the Value?
       More system memory is used.

   When Should the Value of This Tunable Be Lowered?
       This value should be lowered when a minimal system is being created.

   What Are the Side Effects of Lowering the Value?
       The system may run out of ptys.

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.

SEE ALSO
       kctune(1M), privileges(5), pts(7).

			   Tunable Kernel Parameters		    nstrpty(5)

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