II14705: HOW DO I CHANGE IGDSMSXX PARMLIB DEFAULT FROM SAM_USE_HPF(YES) TO SAM_USE_HPF(NO)

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APAR status

  • INTRAN

Error description

  • How do I change IGDSMSxx PARMLIB default from SAM_USE_HPF(YES)
    to SAM_USE_HPF(NO).
    SAM_USE_HPF(YES) is the default, when not specified as NO in
    IGDSMSxx.  This parm was made available starting V1R11 with
    apar OA34671. This provided new function in support of
    High Performance FICON for System Z.
    
    Following text is added to MVS Initialization and Tuning
    Reference manual:
    SAM_USE_HPF({YES|NO})
      Specifies whether you want BAM (BSAM, QSAM and BPAM) to use
      HPF when it is available.
      HPF can be enabled by specifying ZHPF=YES on the ZHPF
      statement in the IECIOSxx parmlib member:
    
          * YES specifies that you want BAM to use HPF when it is
            available and enabled.  If you specify or default to
            SAM_USE_HPF(YES), SMS sets on a bit in the DFA,
            DFASAMHPF
          * NO specifies that BAM should not use HPF. If you specify
            SAM_USE_HPF(NO), the DFASAMHPF bit in the DFA control
            block is set off and BAM does not use HPF.
      Default: YES
    
    For procedure on changing the parms using SETSMS command and
    with IPL:
    Turn off HPF for  BAM (BSAM, QSAM and BPAM) by doing the
    following:
    
      1. Issue SETSMS SAM_USE_HPF(NO) on all z/OS 1.11 systems with
         apar OA34672 and higher.
      2. Change the IGDSMSxx member of SYS1.PARMLIB used by all z/OS
         1.11 with apar OA34671 and higher systems to specify
         SAM_USE_HPF(NO) so the changes are implemented after IPL.
    
      NOTE: SAM_USE_HPF(YES) is set by default for z/OS 1.11 with
            apar OA34671 and higher.
    

Local fix

  • Issue SETSMS SAM_USE_HPF(NO) and update IGDSMSxx parmlib
    member and specify specify SAM_USE_HPF(NO)
    

Problem summary

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    II14705

  • Reported component name

    V2 LIB INFO ITE

  • Reported component ID

    INFOV2LIB

  • Reported release

    001

  • Status

    INTRAN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2013-02-19

  • Closed date

  • Last modified date

    2013-02-19

  • 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



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Document information


More support for:

z/OS family

Software version:

001

Operating system(s):

MVS, OS/390, z/OS

Reference #:

II14705

Modified date:

2013-02-19

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