Enabling Asynchronous I/O for File System Devices

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

Prerequisites

SAP recommends that you adjust these operating system parameters to their maximum values:

# kctune aio_max_ops=0x100000
# kctune aio_proc_threads=2048

Task

Enable the allow sql server async i/o configuration parameter.
Enable the enable hp posix async i/o configuration parameter. This parameter is static.
```
sp_configure 'enable hp posix async i/o', 1
```
Restart SAP ASE.
See Setting Configuration Parameters in the System Administration Guide, Volume 1.