I wasn't saying that the parameter changes were necessarily the cause of the problem - it was just a casual observation.
However, we now see that you've upgraded your system and in the process decreased the number of processors and the amount of memory by half. Again, this may not be the cause of the problem, since it was apparently occurring before the modifications. But the changes may be exacerbating a previously existing problem. It may have something to do with the fact that there are now more users on the system, but if the problem also occurs with only 10 users, that doesn't seem likely.
Until there are more footprints left by the problem as it's occurring, it's difficult to say what's causing it. Making the parameter changes seems to be the best choice at this point. If it doesn't resolve the problem, at least you know one more thing that isn't the cause. Find enough things that aren't the problem, and hopefully it will be easier to figure out which of the remaining possibilities is the gremlin. (Calculatus Eliminatus, for students of Seuss.)
Good luck and thanks for keeping us informed as this progresses.
Tim Snyder
IBM Data Management Solutions
Consulting I/T Specialist , U2 Professional Services
[EMAIL PROTECTED]
[EMAIL PROTECTED] (Vance Dailey)
Sent by: [EMAIL PROTECTED] 02/04/2004 12:36 PM | To: "'U2 Users Discussion List'" <[EMAIL PROTECTED]> cc: Subject: RE: UV command failing mystery |
We upgraded our system from a 16 processor AV20000 to an 8 processor AV25000. Because each block of 4 cpus can only support 4gb of memory our upgrade was going to cut our memory in half. So, the main purpose of the changes was to cut the memory requirements of the universe lock tables. And in fact we successfully cut the per user memory usage in half. The other changes were made as part of the overall review prior to the upgrade. I intend to set a few of the Unix setting back to their original values this weekend, but if I understand the parameters its hard to see how the current values could be causing the problem. I should point out that the uv problem occurred a few time prior to the system upgrade so I have discounted the possibility that the upgrade could be the problem. We are running more users now and the frequency of the problem has increased over the last couple of weeks. However the problem happens at random times, sometimes with 10 users logged in, and at other times with 700 users logged in. I'll let everyone know if changing the parameters back helps the problem, but I am not real optimistic since we only experienced the problem a few times in the month following the changes but we are now getting the problem an average of once a day.
Thanks for responding. All suggestions are welcome.
Vance Dailey
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