AIX - ESS - kernalized I/O?

Hi everybody.

I learned from one particular source that AIX accesses files on our IBM ESS as raw devices.
Therefore, AIX would be using kernalized asynchronous I/O (AIO) on these volumes.
Because of this, the AIO minservers and AIO maxservers would not play a role in the performance
of the I/O subsystem (at least not with regards to these ESS devices).

Unfortunally, I couldn't find any further information on this subject. What I would really like to
know if somebody can confirm this. As we are now using 150 (!) AIO servers (each eating
9MB of memory) on a particular node, we are currently wasting 1.3GB of memory. It would be really nice if this memory can be released back to the system.

Regards,

Falco Paul
Shell DBA services Received on Tue Apr 23 2002 - 10:11:06 CDT