Okay, This shouldn't be too difficult to determine.
first, when you notice the HIGH CPU, what other address spaces are also showing HIGH CPU, there will probably be at least one. second, can you check your RMF III reports and see if there are any enqueues at the time, and who they are for I would be most intrested in contention for SYSZIGW3 IGWSHC02 resources if they exist (if so I have your answer). third, Have you discovered what actual programs are involved at the time, is this a standard IDCAMS job or is it a user written program of some sort that is performing the functions. I'm not sure about your expertise level, but the next step (if nothing came out of the above questions) would be a GTF trace so that we can see what we are doing. Depending on the answers to the above, you should be able to code, or I could give you the parms necessary to perform the trace. If you are familiar with using the trace results then you're golden and the cause should be relatively easy to find (a fix might be a little more difficult). I'm fairly certain that I have seen your problem before. let me know what your results are to the above. Brian Westerman ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html