PM27464: LIST.HISTORY DBD HOLD ENQUEUE AGAINST RECON FOR THE DURATION IF THE COMMAND CAUSING RECON CONTENTION PROBLEMS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• LIST.HISTORY DBD(x) for a DEDB with 89 Areas, 99 CAs and 4 ICs
  takes 40+ minutes wall clock time to process. During this time
  an enqueue on the RECON is held.
  The code will be changed to hold the enqueue for length of time
  needed to read the records into storage. Once in storage the
  enqueue will be released.
  

Local fix

• Process against a backup copy of the RECON(s) or code
  FROMTIME(x) on the LIST.HISTORY DBD command.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS V10 DBRC users of LIST.HISTORY       *
  *                 may be affected.                             *
  ****************************************************************
  * PROBLEM DESCRIPTION: LIST.HISTORY holds the RECON enqueue    *
  *                      for the duration of the job locking out *
  *                      other DBRC activity.                    *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  LIST.HISTORY DBD(x) for a DEDB with 89 Areas, 99 CAs and 4 ICs
  takes 40+ minutes wall clock time to process. During this time
  an enqueue on the RECON is held locking out other RECON access
  for the duration of the job.
  

Problem conclusion

• GEN:
  KEYWORDS:
  
  *** END IMS KEYWORDS ***
  DSPURP00 and DSPURPHT have been changed to resolve this problem.
  Now, the RECON enqueue will be held long enough to collect all
  of the records required for the LIST.HISTORY. In this case that
  took approximately 17 secs.  The RECONs will then be released so
  other jobs can access them.  The process will continue to format
  the output list which does not require access to RECON.
  

Temporary fix

Comments

APAR Information

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

  PM26541

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

  UK63352

Modules/Macros

• DSPGDB   DSPURPHT DSPURP00
  

Fix information

• Fixed component name

  IMS V10

• Fixed component ID

  5635A0100

Applicable component levels

• R010 PSY UK63352

     UP10/12/23 P F012

Fix is available

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