PQ85786: HP UNLOAD SET AMP PARAMETERS FOR VSAM KSDS.

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• This APAR provides a functional enhancement for HP Unload
  to set the AMP parameters that specify the number of
  buffers for a VSAM KSDS.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of IBM IMS High Performance        *
  *                 Unload for OS/390 Release 1 (FMID=H1IN110).  *
  ****************************************************************
  * PROBLEM DESCRIPTION: This APAR enables IMS High Perfoemance  *
  *                      Unload for OS/390 Release 1 to set      *
  *                      the buffer numbers for VSAM KSDS        *
  *                      internally.                             *
  ****************************************************************
  * RECOMMENDATION: Apply the maintenance for this APAR.         *
  ****************************************************************
  This APAR enables the HSSR Engine to set the buffer numbers
  for VSAM KSDS cluster as follows:
     BUFNI = Number of levels
     BUFND = One-fifth of the number of CIs per CA
  BUFNI is used for the index component and BUFND is used for
  the data component.
  
  When the buffer numbers are specified by the AMP parameter
  on the JCL DD statement, the specified numbers are used.
  

Problem conclusion

Temporary fix

Comments

• ========================
  = DOCUMENTATION CHANGE =
  ========================
  IMS High Performance Unload for OS/390 User's Guide
  (SC27093602) should be changed as follows:
  
  2.0        Customization and Diagnosis
  2.1        Tuning Buffer Handlers
  2.1.3      Buffering KSDS
  2.1.3.1    "Native" VSAM
  2.1.3.1.1  Specifying and Tuning the Number of Buffers
  
   The number of buffers for the processing of the index and data
   components of the KSDS cluster can be specified separately
   on the JCL DD statement.
  
   The DD statement should be coded as follows:
      //KSDS  DD  DSN=IMSVS.VSAM,DISP=SHR,
      //          AMP=('BUFND=8,BUFNI=4')
   BUFND is used to specify the buffer number for the data
   component and BUFNI for the index component of the KSDS
   cluster.
  |If the AMP parameter is not coded, the HSSR Engine
  |set the numbers of buffers for NSR as follows:
  |  BUFNI = Number of levels
  |  BUFND = One-fifth of the number of CIs per CA
  ==================== End of Doc-Change ======================
  

APAR Information

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

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

  UQ86428

Modules/Macros

•    FABH510
  

Fix information

• Fixed component name

  IMS HIGHPERF UN

• Fixed component ID

  5655E0600

Applicable component levels

• R110 PSY UQ86428

     UP04/03/23 P F403

Fix is available

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