Enabling Asynchronous I/O for File System Devices

Enable asynchronous I/O for file system devices on HP-UX.

SAP recommends that you adjust these operating system parameters to their maximum values:
# kctune aio_max_ops=0x100000
# kctune aio_proc_threads=2048
  1. Enable the allow sql server async i/o configuration parameter.
  2. Enable the enable hp posix async i/o configuration parameter. This parameter is static.
    sp_configure 'enable hp posix async i/o', 1
  3. Restart SAP ASE.
    See Setting Configuration Parameters in the System Administration Guide, Volume 1.