PH26679: ABENDS878

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• QSAM encountered ABENDS878 with GETMAIN processing of buffer.
  This buffer is acquired below 16MB, and the value of the
  READNUM parameter of DRF affects the number of times this buffer
  is acquired.
  
  The following DRF functional improvement will be implemented:
  ·VSCR support for QSAM buffer (GETMAIN QSAM buffer above 16MB)
  ·Changing the default value of the DRF READNUM parameter and the
  DRF sample JCL (READNUM value change from (3,10) to (3,3)).
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All IMS Recovery Solution Pack for z/OS      *
  *                 Version 2 Release 1 ( FMID=HAHM210 )         *
  *                 IMS Database Recovery Facility users.        *
  ****************************************************************
  * PROBLEM DESCRIPTION: ABEND S878 during DRF execution.        *
  ****************************************************************
  * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
  ****************************************************************
  In the DRF log read task, QSAM gets buffers below 16MB to read
  the log data set. If multiple log read tasks are running in
  parallel, storage shortage below 16MB may occur, and ANENDs with
  S878.
  The maximum number of log read tasks can be specified by the
  READNUM parameter of DRF, but in order to reduce the risk of
  S878 ABEND, DRF must be changed as follows:
  
  - Provide VSCR support for QSAM buffer
    (GETMAIN QSAM buffers above 16MB)
  - Change the default value of the DRF READNUM parameter and the
    DRF sample JCL (READNUM value changed from (3,10) to (3,3))
  

Problem conclusion

• FRXYALL0, FRXMINI0 and internal COPY member are modified to
  support VSCR for QSAM buffer.
  FRXEDRF0 and internal MACRO member are modified to change the
  default value of READNUM parameter.
  FRXDRFZZ(sample member) is modified to change the value of
  READNUM parameter in the DRF sample JCL.
  

Temporary fix

Comments

APAR Information

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

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

  UI70326

Modules/Macros

• FRXDRFZZ FRXEDRF0 FRXMINI0 FRXYALL0
  

Fix information

• Fixed component name

  IMS RCVR SOLUTN

• Fixed component ID

  5655V8600

Applicable component levels

• R210 PSY UI70326

     UP20/07/02 P F007

Fix is available

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