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Top Forums UNIX for Dummies Questions & Answers Maximum number of users allowed Post 52455 by Kelam_Magnus on Friday 18th of June 2004 01:32:19 PM
Old 06-18-2004
The max number of users on HPUX is equal to npty... The number of sessions that can be active at any one time.

# kmtune |grep pty
npty 200 - 200


or use

# sysdef |grep pty
npty 200
 

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npty(5) 							File Formats Manual							   npty(5)

NAME
npty - maximum number of BSD pseudo terminals (ptys) VALUES
Default Allowed Values DESCRIPTION
is the number of pseudo terminal (pty) 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 communication 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. Using a parameter value significantly larger than the number of ptys is not recommended. 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), pty(7). Tunable Kernel Parameters npty(5)
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