aio_prio_delta_max(5) aio_prio_delta_max(5)
Tunable Kernel Parameters
NAME [Toc] [Back]
aio_prio_delta_max - greatest delta (slowdown factor) allowed in POSIX
async IO request priorities
VALUES [Toc] [Back]
Failsafe
20
Default [Toc] [Back]
20
Allowed values [Toc] [Back]
The minimum value allowed is 0. The maximum value allowed is 20.
Specify a positive integer value.
DESCRIPTION [Toc] [Back]
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 [Toc] [Back]
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 [Toc] [Back]
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 [Toc] [Back]
aio_prio_delta_max was developed by HP.
Hewlett-Packard Company - 1 - HP-UX 11i Version 2: Sep 2004
aio_prio_delta_max(5) aio_prio_delta_max(5)
Tunable Kernel Parameters
SEE ALSO [Toc] [Back]
kctune(1M), sam(1M), gettune(2), settune(2), aio(5).
Hewlett-Packard Company - 2 - HP-UX 11i Version 2: Sep 2004 [ Back ] |
