PK23464: HD POINTER CHECKER TAKES TOO MUCH ELAPSED TIME, WHEN A LOT OF T2 ERRORS, IN THE DATABASE, ARE RECORDED.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When there is an unknown space that is not segment data or
  free space in the data base, HD Pointer Checker reports the
  unknown space as a T2 error. At the time of reporting the T2
  error, HD Pointer Checker calculates the disk address of the
  unknown space to show the disk address in the report.
  .
  During this calculation, HD Pointer Checker LOADs and DELETEs
  the FABPUADR module that calculates the disk address. When there
  are a large number of T2 errors, a large number of LOAD and
  DELETE operations occur and this causes very long elapsed
  time problems.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: IBM IMS High Performance Pointer Checker for *
  *                 z/OS Version 2 Release 1 (FMID=HPC2210)      *
  *                 users.                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: HD Pointer Checker(HDPC) takes too long *
  *                      elapsed time, when there are a lot of   *
  *                      T2 or pointer errors in the database.   *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  To report disk address of the block or CI in the database data
  set, HD Pointer Checker calls a sub module FABPUADR that
  calculates the address. HD Pointer Checker issues LINK macro
  to call the module for every time it calculating a segment or
  pointer address. When there are a lot of error pointers and
  segments, fetch operations occur high-frequency. Therefore, it
  takes too much elapsed time.
  In order to reduce the fetch overhead, HD Pointer Checker has
  been changed to LOAD and DELETE the module at once.
  HD Pointer Checker LOADs the module in the initialize process,
  CALL it for each segment or pointer, and then DELETE it in the
  termination process.
  

Problem conclusion

• The following modules have been fixed to reduce the fetch
  operations:
  
     FABPBCTL,FABPECTL,FABPHPSD,FABPHSDA,FABPHSHI,FABPHSIX,
     FABPLINK,FABPPSDA,FABPPSIX,FABPSDA0,FABPSHI0,FABPSIX0,
     FABPSNAP,FABPUADR,FABPUMAP,HPC2210J
  

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:

  UK14445

Modules/Macros

•    FABPBCTL FABPECTL FABPHPSD FABPHSDA FABPHSHI
  FABPHSIX FABPLINK FABPPSDA FABPPSIX FABPSDA0 FABPSHI0 FABPSIX0
  FABPSNAP FABPUADR FABPUMAP HPC2210J
  

Fix information

• Fixed component name

  IMS POINTER CHE

• Fixed component ID

  5655E0900

Applicable component levels

• R210 PSY UK14445

     UP06/05/16 P F605

Fix is available

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