HP-UX Reference (11i v2 03/08) - 5 Miscellaneous Topics, 7 Device (Special) Files, 9 General Information, Index (vol 9)

a
aio_prio_delta_max(5) aio_prio_delta_max(5)
(Tunable Kernel Parameters)
NAME
aio_prio_delta_max - greatest delta (slowdown factor) allowed in POSIX async IO request priorities
VALUES
Failsafe
20
Default
20
Allowed values
The minimum value allowed is 0. The maximum value allowed is
20.
Specify a positive integer value.
DESCRIPTION
This parameter places a limit on how much the priority of a POSIX asynchronous I/O operation can be
reduced to slow it down. This is the maximum priority-offset value allowed for
aio_reqprio in the
asynchronous-I/O control block structure
aiocb.
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?
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.
AUTHOR
aio_prio_delta_max
was developed by HP.
SEE ALSO
kctune(1M), sam(1M), gettune(2), settune(2), aio(5).
Section 5−−28 Hewlett-Packard Company − 1 − HP-UX 11i Version 2: August 2003