Do you have any automation tools like OPS/MVS or Tivoli or other? Perhaps you need a timer in the VARY command step to delay the time the next step runs.
The vary may not be slow, but the IO Subsystem to the array may not be coming back quickly enough. Have you run performance reports on the storage array itself when the commands are running? Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of baby eklavya > Sent: Saturday, April 19, 2014 9:28 PM > To: [email protected] > Subject: Re: Slow vary commands processing > > That's the problem with us now ...we don't see significant difference from > the logs . > > When one device is varied offline , it gets processed instantly > > When vary is issued against a set of devices (may be 10 ) , we see a delay > of 15 to > 20 seconds . But our storage person keeps complaining that vary commands are > processed slow . I believe , it is because there are so many backup jobs > failing from > last few months compared to earlier . > > For eg , we had an abend yesterday where STEP 1 issues a vary command against > a set of volumes . And STEP 2 runs an ICKDSF to init the volume . > It fails saying the volume is not offline . > > Looking at CMDS display , we don't see anything queued up for long . > > Nothing was changed in the system recently . > > > > > > > > > On Sun, Apr 20, 2014 at 9:35 AM, Lizette Koehler > <[email protected]>wrote: > > > How did you determine they are slow. > > > > How long do you think they should take? > > How long would it normally take? > > How long does it now take? > > How many devices are in the vary command at one time? > > > > What analysis have you done to determine "slow" > > > > What timings do you get when you vary one device compared to 10 > > compared to 100? > > > > Do you see any error messages indicating the commands are not processing? > > > > Have you issued the CMDS command to see what is going on at the same > > time as the slow commands? > > > > > > Lizette > > > > > > > -----Original Message----- > > > From: IBM Mainframe Discussion List > > > [mailto:[email protected]] On Behalf Of baby eklavya > > > Sent: Saturday, April 19, 2014 8:54 PM > > > To: [email protected] > > > Subject: Slow vary commands processing > > > > > > Greetings , > > > > > > In our shop , we see that vary commands are processed slow most of > > > the > > time . We > > > have not applied any maintenance recently and there are no messages > > > or > > dumps > > > which actually tell us why this happen . Can someone share some > > possibilities in > > > general when this can happen ? > > > > > > We are running z/os 1.11 on a Z196 processor with DS8800 boxes . > > > > > > Regards, > > > baby > > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
