II08639: INFOAPAR 5746SM310 DFSORT/VSE 3.1. PERFORMANCE DEGRADATION AND EXCESSIVE PAGING WHEN USING LARGE AMOUNT OF GETVIS.

APAR status

• Closed as canceled.

Error description

• THIS INFO APAR IS FOR DFSORT/VSE 5746SM310 AND WILL CONTAIN
  INFORMATION WHICH HAS NOT BEEN APARED UNDER NORMAL PROCEDURE.
  1.  MAY SEE PERFORMANCE DEGRADATION WHEN SPECIFIED AMOUNT OF
      GETVIS IS EXCESSIVE WHEN COMPARED TO THE AMOUNT OF AVAIL-
      ABLE CPU REAL STORAGE.  THE SYSTEM MAY APPEAR TO BE IN A
      LOOP, THIS IS DUE TO HIGH PAGING ACTIVITY.  THE SYSTEM IS
      NOT IN A LOOP.  THE JOB WILL EVENTUALLY COMPLETE IF ALLOWED
      TO CONTINUE.  USER REPORTING THIS PROBLEM WAS REQUESTING
      A GVSIZE=100M WHILE EXECUTING IN A PARTITION SIZE OF 128M.
  
      DFSORT/VSE DEVELOPMENT HAS INDICATED THAT FUTURE RELEASES OF
      DFSORT/VSE  WILL BE DESIGNED TO CONSIDER PAGING ACTIVITY IN
      RELATIONSHIP TO THE AMOUNT OF AVAILABLE CPU REAL STORAGE,
      THUS, PREVENTING VERY HIGH PAGING ACTIVITY BY REDUCING THE
      AMOUNT OF USED GETVIS AREA OR DATASPACE AREA.
  
      FOR MORE INFORMATION REGARDS SORTING WITH GETVIS AREA,
      PLEASE SEE CHAPTER 8 OF THE DFSORT/VSE INSTALLATION AND
      TUNING GUIDE (SC26-7041-00).  SPECIAL ATTENTION SHOULD BE
      GIVEN TO THE SECTION TITLED: RECOMMENDATIONS FOR SORTING
      WITH GETVIS AREA, PP48-49.
  THE EXPLANATION IN THE DFSORT MESSAGE AND CODES APPEARING
  IN APPENDIX A OF DFSORT/VSE APPLICATION PROGRAMMING GUIDE
  SC26-7040-00 NEEDS ENHANCING FOR THE FOLLOWING MESSAGES:
  MSG7E22I, MSG7F22I, MSG7G22I (7E22I, 7F22I, 7G22I).
  INSUFFICIENT WORK SPACE.
  
  THE EXPLANATION IS INCOMPLETE AND MISLEADING.  IT IMPLIES
  THAT THESE MESSAGES ARE ONLY ISSUED FOR INSUFFICIENT WORK SPACE.
  
  THE ABOVE MESSAGES ARE ISSUED FOR INSUFFICIENT STORAGE AND/OR
  WORK SPACE.  SEE PROGRAMMER RESPONSE FOR RECOMMENDED SOLUTIONS:
  
  PROGRAMMER RESPONSE:
  
  INCREASE DFSORT/VSE AVAILABLE STORAGE/WORK SPACE BY:
  
     ADDING ADDITIONAL SORT WORK FILES
  
     INCREASING THE VALUE OF THE 'SIZE' PARAMETER ON THE EXEC
     JOB CONTROL STATEMENT
  
     INCREASING THE VALUE OF THE 'SIZE' JOB CONTROL LANGUAGE
     STATEMENT OR COMMAND
  
     USING THE STORAGE OPERAND ON THE OPTION STATEMENT, IF
     CURRENTLY BEING USED INCREASE ITS VALUE.
  
     INCREASING THE PARTITION SIZE
  
     PLACING ELIGIBLE DFSORT/VSE MODULES (PHASES) IN SVA,
     IF NOT ALREADY IN SVA.
  THIS IS A TEST ONLY
  

Local fix

• REDUCE THE VALUE SPECIFIED FOR THE GVSIZE OPTION.  NOTE:
  REPORTING USER RESOLVED PROBLEM BY CHANGE GVSIZE=100M TO 64M.
  KEYWORDS:
  5746SM310 INFOAPAR INFO APAR
  

Problem summary

Problem conclusion

Temporary fix

Comments

• THIS IS AN INFO APAR
  

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