NAME
aio_listio_max — the maximum number of POSIX asynchronous I/O operations that can be specified in a listio() call
VALUES
Allowed values
The minimum value allowed is
2.
The maximum value allowed is
0x100000.
The value is further constrained in that it must be less than or equal to
aio_max_ops.
Specify a positive integer value.
DESCRIPTION
This parameter places a limit on the system resources
that can be consumed
if a large number of POSIX asynchronous I/O operations are
requested in a single
listio()
call.
The value should be set large enough
to meet system programming needs
while protecting the system against
excessive asynchronous I/O operations
initiated by a malfunctioning process.
Who Is Expected to Change This Tunable?
System administrators that run applications requiring heavy usage of
POSIX AIO to file systems.
Restrictions on Changing
This tunable is dynamic
(tuning will take effect immediately on the running system).
What Other Tunables Should Be Changed at the Same Time as This One?
The value assigned to
aio_listio_max
must be less than or equal to
aio_max_ops.
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 tunable values, consult the documentation
for the kernel software being installed.
For information about optional kernel software that was
factory installed on your system, see
HP-UX Release Notes
at
http://docs.hp.com.
AUTHOR
aio_listio_max
was developed by HP.
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