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 aio_listio_max(5)                                         aio_listio_max(5)
                          Tunable Kernel Parameters

 NAME    [Toc]    [Back]
      aio_listio_max - the maximum number of POSIX asynchronous I/O
      operations that can be specified in a listio() call

 VALUES    [Toc]    [Back]

    Default    [Toc]    [Back]

    Allowed values    [Toc]    [Back]
      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    [Toc]    [Back]
      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    [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?
      The value assigned to aio_listio_max must be less than or equal to

 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

 Hewlett-Packard Company            - 1 -      HP-UX 11i Version 2: Sep 2004

 aio_listio_max(5)                                         aio_listio_max(5)
                          Tunable Kernel Parameters

 AUTHOR    [Toc]    [Back]
      aio_listio_max was developed by HP.

 SEE ALSO    [Toc]    [Back]
      kctune(1M), sam(1M), gettune(2), settune(2), aio(5), aio_max_ops(5).

 Hewlett-Packard Company            - 2 -      HP-UX 11i Version 2: Sep 2004
[ Back ]
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