II07347: ABEND878, ABEND80A WHEN DATASETS SMS MANAGED. THIS APAR WILL BE UPDATED AS NEW INFO COMES TO LIGHT.

APAR status

• Closed as canceled.

Error description

• NOTE that all of the information in this Info APAR applies to
  to batch jobs, Started Tasks (STC) and TSO sessions (TSU).
  
       Following conversion to SMS management, jobs / tasks may
  suffer a variety of virtual storage abends such as abend822
  rc14 (IEF085I REGION UNAVAILABLE, ERROR CODE = d'20' = rc20),
  abend878 rc10 or abend80A rc10.  There are several added
  requirements of virtual storage for SMS managed jobs/tasks
  versus the same job/task not SMS managed.  For SMS managed
  jobs:
  
  1. A x'C0' byte SWB will be built for each data set with DISP =
     NEW or DISP=MOD in the job.  This SWB is built during C/I
     (Converter / Interpreter processing) prior to the job's
     beginning execution.  More than one SWB may be built at
     this time.
  
  2. A x'C0' byte SWB will be built for each ds with DISP=OLD or
     DISP=SHR during step allocation after the job has begun
     execution.  More than one SWB may be built at this time.
  
  3. A JFCBX (JFCB eXtension) is built for each ds in a job
     when:                            (JFCX = x'B0' bytes)
        A: The dataset is a candidate for multiple volumes,
        B: The Dataset name is an alias, or
        C: The dataset is to be cataloged.
  
  Since SMS requires data sets it is to manage to be cataloged,
  this may cause additional JFCX's to be built.
  
  Note: All SWA blocks have a x'10' byte "prefix", making (e.g.)
        a x'B0' byte JFCX actually occupy x'C0' bytes of storage,
        and a x'C0' byte SWB occupy x'D0' bytes of storage.
  
  ********
       An increase in virtual storage use is to be expected when
  jobs become SMS managed, based upon the variables described
  above.  Info apar II05506 may be used as a diagnostic technique
  to confirm the cause of virtual storage abends.
  ********
  
  Possible circumventions:
  1) Decrease the REGION parameter of the job,
     to make more storage available for the Scheduler Work Area.
     SWA is part of the PRIVATE AREA but not part of REGION.
  2) Split the job into two or more smaller jobs, or
  3) For JES3, use inish statement CIPARM PARM= to cause SWA
     blocks to be GETMAINED above the 16meg line.
     For JES2, use command $T JOBCLASS(x),SWA=ABOVE where x is
     jobclass, STC, TSU, or wildcard (* or ?) to identify classes
     to be changed. Be sure to also update the JES2 init deck
     JOBCLASS statement.
  4) To control the placement of SWA for 1 particular JOB, one
     would need to write an IEFUJV exit and pass x'04' in word
     4 of the IEFUJV input parmlist.  See your OS/390 or z/OS
     Installation Exits manual for IEFUJV specifics.  You should
     find an IEFUJV example exit in the MVS sample library that
     comes with your MVS release.
  5) Decrease your CSA allocation
  
  As design changes are made, the particulars of this issue may
  also change.  This info apar will be updated from time to time
  with new details or amendments as they become known.
  
  A. APAR OW23626 (incorporated into base code for OS/390 V2R5 =
     HBB6605 = R605) created the possibility of requiring one
     additional SWB for SMS managed datasets.
  B. APAR OW43715 (incorporated into base code for OS/390 V2R10 =
     HBB7703 = R703) created the possibility of requiring one
     additional SWB for SMS managed datasets.
  C. APAR OW44540 created the possibility of requiring one
     additional SWB for SMS managed datasets.
  D. APAR OW50040 created the probability of REDUCING the
     requirement for SWBs for SMS managed datasets by two.
  

Local fix

• 1) Decrease batch jobs region size to make more storage
     available for the Scheduler Work Area.
  2) Split the job into 2 or more smaller jobs, or
  3) Use the jes2 init parm JOBCLASS(v), keyword SWA(ABOVE)
     or the jes3 inish parm CIPARM to cause swa blocks to be
     built above the 16m line.
  4) Write an IEFUJV exit to pass X'04' in word 4 to MVS C/I
  5) Decrease CSA allocation.
  
  Additional Keywords:
       s822 abends822 MSGIEF085I, s878 abends878, s80A abends80A,
       IEFJDT02 sp237 key1 k1 sp236 swa dd
  

Problem summary

Problem conclusion

Temporary fix

Comments

• closed for pin
  DB2INFO JES2INFO VSAMINFO
  
  Additional keywords: Abend822 s822 abends822
  abends878 s878 abends80A s80A rc10 ABEND106 S106 rc28
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

Applicable component levels