>It was a custom application written for a very large customer. Someone else >mentioned >that it seemed an improbable scenario. Be that as it may, it >happened.
The problem isn't simply with the scenario of acquiring a lock, but rather than there was an apparent upgrade of 250% (regarding the number of engines) and apparently NOBODY bothered to gather data to determine the basis for such a change. Secondly, your assertion that the processor was at 100% utilization, suggests that the four engines were occupied in spin loops, which also suggests that no other work was capable of running (which is another implausible scenario). Since the conclusion was that they didn't even require a 4-way after the problem was "solved", it is clear that the utilization of the processor was driven by the spin loops which leads one to conclude that there could have been no other running work on the system beyond four transactions. As I indicated, this stretches the bounds of even anectodal evidence and would require a much more detailed explanation to approach plausibility. Adam ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
