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Yesterday early morning we upgraded our OS to AIX 5.3 . We also installed new disk drives: a RAID5 file subsystem. By the time it started to get hit with regular Thursday morning traffic, thousands of messages were queueing in our registration system that feeds our engine. We normally are able to process 1.8 to 2.4 messages per second, but now were only handling about .85 . We are slow in getting ACKs back to them. We tried all sorts of things. Quovadx support provided some parameters that were supposed to go in the security limits file, but we already matched what they recommended. We then enabled concurrent I/O for the drives. However, it seemed to lock up the recovery database. So, we backed that out and got it to run, but slow again. Finally, the decision was made to back out our implemenation. We got things to running again and eventually got caught up. Needless to say our management are not happy campers and we impacted the entire operations of our hospital. This is the 2nd time we’ve had to back out our upgrade to AIX 5.3 .
We’ve heard that AIX 5.3 should not be run on a IBM P4 series hardware. Have any of you had any issues with AIX 5.3? We are running Cloverleaf 5.4.1 rev1.
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