hpux man page for nstrpty

nstrpty(5)							File Formats Manual							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 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  tun-
       able  values,  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)