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LEARN ABOUT HPUX

strctlsz

STRCTLSZ(5)							File Formats Manual						       STRCTLSZ(5)

NAME

       STRCTLSZ - maximum size of streams message control (bytes)

VALUES

   Failsafe
   Default
   Allowed values
   Recommended values
DESCRIPTION

       limits the maximum number of bytes of control data that can be inserted by in the control portion of any streams message on the system.	If
       the tunable is set to zero, there is no limit on how many bytes can be placed in the control segment of the message.

       returns if the buffer being sent is larger than the current value of

   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 more bytes in the control portion of any
       streams message 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 control
       portion 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 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.

							     Tunable Kernel Parameters						       STRCTLSZ(5)