Robert, it sounds like a normal situation. The biggest problem being the one waiting for the exclusive, who was that? Any time something wants an exclusive on a high activity catalog, things will back up. MA
On Mon, Feb 9, 2009 at 7:32 AM, Raupach, Robert E (ISD, IT) < [email protected]> wrote: > Question about enqueues and reserves. We recently encountered the > following situation. > > A batch job held a shared enqueue to a user catalog. Waiting behind this > job > was an exclusive CATALOG enqueue request. In addition, there were a > number of batch jobs and started tasks, including the JES3 Converter > Interpreter and DSFHSM also waiting for the user catalog. > > Batch and TSO access was hindered because the converter interpreter was > waiting for access to user catalog. > > Eventually, the problem "cleared itself" and processing continued. Since > we > have a tight batch window, I need to investigate further. We were told > that > 15 minutes before the initial job hung, system backups on HSM pool packs > had > completed and that any reserve on the pack containign the user catalog > would have been released. > > The system programming team thought the problem was with the batch job > that actually hung waiting for the user catalog. There's nothing unusual > with > the batch job. It's been running for years without incident. The problem > has > recurred with a different batch job, different user catalog on a different > pack. > > We're running z/OS 1.8 with JES3. > > So, my questions are - could something (storage backups) have not cleared > the reserve that it put on the pack after the backups ended? Something > else? How could I investigate this further? > > Feel free to email off list. > thanks, > Bob R > > ---------------------------------------------------------------------- > 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 > ---------------------------------------------------------------------- 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
