problems with AIX 5.3 again

This topic has 9 replies, 5 voices, and was last updated 16 years, 6 months ago by Michael Hertel.

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May 30, 2008 at 1:22 pm #50079
Kevin Scantlan
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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.

Thanks.
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- May 30, 2008 at 5:10 pm #64794
  Michael Hertel
  Participant
  This is ringing a bell, but I can’t remember what it was.
  
  Check that the right maintenance levels are applied from IBM.
  
  Check with support to find out which ML is supported.
- May 30, 2008 at 5:45 pm #64795
  Michael Hertel
  Participant
  See if this helps:
  
  https://usspvlclovertch2.infor.com/viewtopic.php?t=1973
- May 30, 2008 at 6:01 pm #64796
  Kevin Scantlan
  Participant
  Your’s was taking as much as 16 seconds. The most ours was approximately 1.2 seconds. This is compared to it taking much less time (approximate .5 sec or less) while under 5.2 .
- May 30, 2008 at 6:22 pm #64797
  Michael Hertel
  Participant
  I understand that, but Russ’ reply I thought was helpful.
- May 30, 2008 at 6:30 pm #64798
  John Hamilton
  Participant
  We ran into the same kind of issue earlier.
  
  The problem had to do we some environment settings.
  
  I don’t recall what they were this was 6 months ago or so.
  
  There should be something the cloverleaf release notes about it.
  
  I may have this confused with something else. But I do know it was running just very slow. But much improved after modfing some environment. Sorry I don’t recall what it was.
- June 2, 2008 at 2:23 pm #64799
  John Custer
  Participant
  Can you check to see if you have an entry in your resolv.conf file …. here is an example …. this should resolve slow response time …. John
  
  # more /etc/resolv.conf
  
  nameserver 123.45.67.890
- June 2, 2008 at 3:44 pm #64800
  Russ Ross
  Participant
  John:
  
  Your comment about the /etc/resolve.conf file jogged my memory.
  
  We started seeing slowness while they were adding additional domains and ended up adding a search entry to our /etc/resolve.conf file.
  
  Here is what is in our /etc/resolve.conf file at this time
  nameserver 143.111.201.254
  
  nameserver 143.111.89.254
  
  nameserver 143.111.64.254
  
  search mdacc.tmc.edu utmdacc.org mdanderson.edu
  
  Russ Ross
  RussRoss318@gmail.com
- June 3, 2008 at 2:00 am #64801
  Kevin Scantlan
  Participant
  I don’t believe that our resolv.conf has changed. The only change was going from AIX 5.2 to AIX 5.3 .
- June 3, 2008 at 12:10 pm #64802
  Michael Hertel
  Participant
  You might want to have them check anyway.
  
  Then again, you said you backed it out?
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