To improve I/O performance on character or raw and block devices, enable asynchronous I/O
by installing the HP asynchronous I/O driver from SAM.
- Shut down Adaptive Server.
- From the SAM Kernel Configuration menu, choose Drivers and set the
pending state for asyncdisk to In by adding the driver.
Alternatively, add the asyncdisk subsystem keyword to
/stand/system.
- Rebuild the kernel, and restart the system.
- Using the userid root, execute:
#/etc/mknod/dev/async c 101 4
#chmod 0660/dev/async
#chown <uid> /dev/async
#/etc/setprivgrp <ugrp> MLOCK
where:
- <uid> is the identification (user ID) used by the
user who is restarting Adaptive Server. This user must be the owner of
the /dev/async directory.
- <ugrp> is the user group for the
<uid> user ID.