We currently have test and production servers running AIX 5.2, DB2 8.1(Prod), DB2 8.2(Test),Websphere 6.1 on both. We need to upgrade to DB2 to version 9, but to do that we also need to upgrade the operating system to 5.3 and go from 32 bit kernel to 64 bit kernal. Looking for information on any issues that I need to be aware of when doing this. So far my research has found that I can run our current versions of DB2 and Websphere. Any changes to configurations that will need to be made after the OS upgrade? Any issues that I need to be aware of? Thank you.
Hi,
you will entirely have to redo the tuning, and you might run into shared memory trouble with 64bit running 2 shared memory hungry applications in parallel.
Kind regards
zxmaus
Be carefull this package:
devices.common.IBM.mpio.rte 5.2.0.0 - Its sucks! 
If you not commit everything you will suck the 5.3 next TL upgrade! 
5.3 has reach TL 11 You need a lot of free space.
Commit every package in the 5.2!! 
An alt_disk_install would be better.
Thank you both for the information. I will let our installer know. Anybody else?