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CHAPTER 3 Configuring the Operating System
Configuration Guide 39
4 At the UNIX prompt, execute the following statements as “root”. The user
ID of the user who is starting Adaptive Server and Backup Server must be
the owner of the /dev/async directory.
HP-UX 11.23
This step is mandatory for HP users.
To improve I/O performance on character or raw block devices, enable
asynchronous I/O by installing the HP asynchronous I/O driver from SAM. For
help with installing this driver, contact your operating system administrator or
HP technical support.
Note Before executing the following instructions, shut down Adaptive Server
(or SQL Server).
1 To launch the Kernel Configuration use
kcweb -F.
2 Select Modules.
3 Select
asyncdsk and change the next boot to static.
4 Rebuild the kernel, and reboot the system.
5 Execute the following commands using the
userid root:
#/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 that is booting
Adaptive Server.
<ugrp> is the user group for the sybase userid.
6 At the UNIX prompt, execute the following statements as “root”. The user
ID of the user who is starting Adaptive Server and Backup Server must be
the owner of the /dev/async directory.
HP-UX on Itanium
To verify that the async I/O is active on the Itanium machine:
1 Log in as root.
2 Issue the command:
# kcmodule -a | grep aync
Result: asyncdsk static required
or you can also use the following: