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ksi_send_max(5)						       ksi_send_max(5)

NAME
       ksi_send_max - limit on number of queued signals per process

VALUES
   Default
   Allowed Values
DESCRIPTION
       is  the	per  process limit on the number of queued signals that can be
       posted by a sender and currently pending at  receivers.	 The  enforced
       limit  is  per  process	sender	based.	 ksi stands for "kernel signal
       information" and identifies entries with information about queued  sig‐
       nals.   There is one per queued signal.	Queued signals are used by the
       system call, timer expiration, POSIX  real  time	 message  queues,  and
       asynchronous I/O.  User generated signals (via and are not queued.

   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?
       Frequent	 or  heavy  use	 of  facilities	 which use queued signals, may
       require raising this value.  When is returned by the system  call,  the
       tunable should be raised.

   What Are the Side Effects of Raising the Value?
       Increased  memory usage, but only if used.  Every allocated entry is 96
       bytes.

   When Should the Value of This Tunable Be Lowered?
       Only to control the applications' usage of queued signals.

   What Are the Side Effects of Lowering the Value?
       If too low, failure of applications using queued signals may fail.

   What Other Tunable Values Should Be Changed at the Same Time?
       to limit the number of queued signals system-wide.  Since is per system
       based and is per process based, the tunable should always be greater.

       Note that the default value for is and for is

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
       kill(2), sigqueue(2), ksi_alloc_max(5).

			   Tunable Kernel Parameters	       ksi_send_max(5)

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