OA41645: NEW OPTION IN WLM SERVICE DEFINITION TO ENABLE I/O PRIORITY GROUPS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• The WLM ISPF Application is enhanced with a new option on the
  Service Coefficients/Options panel which allows
  I/O priority groups to be enabled.
  
  In addition, this apar is correcting the following problem:
  Abend14F rc4C on a call to STATUS from IRAMSBLD or IRAMSFRE
  after a WLM policy activation.
  External symptom:  AB/S014F 04C NUCLEUS IRARMEVT
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of z/OS 2.1 (HBB7790)              *
  ****************************************************************
  * PROBLEM DESCRIPTION: New option on the Service Coefficients/ *
  *                      Options panel in the WLM ISPF           *
  *                      Administrative Application to enable    *
  *                      I/O priority groups. When set to YES,   *
  *                      WLM considers I/O priority groups and   *
  *                      sets higher I/O priorities for work in  *
  *                      service classes assigned to             *
  *                      I/O priority group HIGH than for work   *
  *                      in I/O priority group NORMAL.           *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The WLM ISPF Application is enhanced by a new option on the
  Service Coefficients/Options panel to enable I/O priority
  groups.  When set to YES, WLM sets higher I/O priorities for
  work in service classes assigned to I/O priority group HIGH
  than for work in service classes assigned to I/O priority
  group NORMAL. When set to NO, I/O priority groups are ignored
  when assigning I/O priorities.  I/O priorities are also
  recognized at the I/O controller level.  As soon as I/O
  priority groups are enabled in the service definition of one
  sysplex, it is recommended to enable I/O priority groups in
  the service definitions of all active systems and sysplexes
  which share I/O controllers. This ensures that all connected
  systems utilize a consistent range of I/O priorities.
  

Problem conclusion

• The WLM ISPF Application is enhanced to provide a new "Enable
  I/O Priority Groups" option on the Service Coefficient/Service
  Definition Options panel.  This new option is used to enable I/O
  priority groups for WLM service classes.  The default setting
  for I/O Priority Groups is NO.
  
  A service class assignment to I/O priority group HIGH is only
  honored if both the I/O Priority Management and Enable I/O
  Priority Groups options are set to YES.  A new check for this
  has been added in the Validate task of the Administrative
  Application and the following message is displayed when one of
  the options is NO but service classes are assigned to HIGH:
  IWMAM918 Service class(es) assigned to I/O priority group HIGH
  but I/O priority management or I/O priority groups are not
  enabled. The I/O priority group will not be honored.
  
  In addition, on the Coefficient/Service Definition Options
  panel, if YES is specified for the Enable I/O Priority Groups
  option while I/O Priority Management is NO, the Administrative
  Application displays the following message:
  IWMAM987 If option for I/O priority groups is Yes, option for
  I/O priority management must also be Yes.
  
  Furthermore, following parts were added to insert missing
  information in the module header:   IRAMSCTH IRAMSFRE IWMP2EAE
  IWMP2ECR IWMP2ESE IWMP2EXT IWMP2RSD IWMP2VDR IWMP2VPA IWMP2VPR
  IWMP2VPS IWMP2VSA IWMP2VSD IWMP2VSE IWMP2VSP IWMP2VS2 IWMP2WAP
  

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:

  UA69916

Modules/Macros

• IRAMSBLD IRAMSBL2 IRAMSCSH IRAMSCTH IRAMSFRE
  IWMAMEWL IWMAM43X IWMAM431 IWMAM464 IWMAM91  IWMAM98  IWMAP8D
  IWMARCHK IWMARDCF IWMARI2X IWMARX2I IWMARZFL IWMAR01  IWMAR8D
  IWMAS01  IWMA2SD1 IWMA3MEW IWMA3M3X IWMA3M31 IWMA3M64 IWMH3DQ
  IWMH8D   IWMH8G   IWMP2EAE IWMP2ECR IWMP2ESE IWMP2EXT IWMP2PRQ
  IWMP2RSD IWMP2SPC IWMP2VDR IWMP2VPA IWMP2VPR IWMP2VPS IWMP2VSA
  IWMP2VSD IWMP2VSE IWMP2VSP IWMP2VS2 IWMP2WAP IWMSVDEF IWMSVPOL
  IWMZ2MST IWMZ2SVP
  

Fix information

• Fixed component name

  SRM - SYS RSRCE

• Fixed component ID

  5752SC1CX

Applicable component levels

• R790 PSY UA69916

     UP13/07/31 P F307

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.