Mark, Operating system level is z/OS 1.9, up and running for almost a year now.
There are only twenty-three 3390-3 volumes. Command is being issued at 0030 hrs daily. $DPERFDATA was new to me. Interesting statistics. I'll read up on it some more, but I like your suggestion regardless. Bob -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Mark Zelden Sent: Monday, January 26, 2009 11:35 AM To: IBM-MAIN@bama.ua.edu Subject: Re: $P JOBQ Question On Mon, 26 Jan 2009 08:18:15 -0800, Gibney, Dave <gib...@wsu.edu> wrote: > How about issuing it more often, like several times a day. Less total >work each time. > Is the time the ckpt is held based on how much work it has to do, or how big the spool is or a combination of both? Bob, how big is your spool and how much is getting purged when you do this typically? One of our MASes has 65 3390-3 volumes and of course we also do daily purges of old output. I haven't heard of any issues like this, but that doesn't mean it doesn't happen. I'm sure it is done in the middle of the night when no one may care. One thing you also didn't mention was the OS level and maintenance level. I had heard of more issues like this when z/OS 1.7 first was released (which introduced a bunch of changes including INTRDR in user environment) but I think some of them may have been fixed (or at least helped) in the service stream. Perhaps a $DPERFDATA prior to and after the command would also shed some light. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:mark.zel...@zurichna.com z/OS Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.html ---------------------------------------------------------------------- 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
