how to increase the queue depth on the vio client

To change the queue_depth on the hdisk device:

To change the queue depth values, the hdisk should be free from I/O operataions. So



1. stop I/O on the device hence unmount all the filesystems.
- varyoffvg <volume group name> or  rmdev -l hdisk<number>


2. To change the queue_depth

- chdev -l hdisk<number> -a queue_depth=<number>

- varyonvg <volume group name> or cfgmgr -l hdisk<number>

3.  You can change the ODM using the -P option and rebooting.

- chdev -l hdiskX -a queue_depth=20 -P

     shutdown -Fr