OA43969: SEEING A LARGE AUTOTIME FOR MVS MESSAGES THAT ARE TO BE AUTOMATED 14/02/24 PTF PECHANGE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Customer recently applied several PTFs to NetView including
  UA67822 which modified the throttling algorithm for CNMCSSIR.
  The customer started seeing very larg AUTOTIME values for MVS
  messages that needed automation. It seems their system is a
  very busy system and it is not unusual to have one or more
  autotasks with a backup on its low priority message queue. This
  backup causes throttling to take place.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of Tivoli NetView for z/OS V5R4    *
  *                 and above (including IACz).                  *
  ****************************************************************
  * PROBLEM DESCRIPTION: When there are over 1000 commands total *
  *                      queued to NetView tasks, automation of  *
  *                      MVS messages is delayed.                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  MVS message throttling goes into effect when either the virtual
  storage usage in the NetView address space is very close to
  maximum or the number of commands waiting to be processed on
  NetView tasks is very high. The value for the "very high" number
  of commands was set to 1000. This was seen as an exception
  condition. However, there are cases where it is not unusual for
  a single autotask to be backed up with more than 1000 commands.
  When this occurs, processing of MVS messages shouldn't be
  delayed because of a backup that's not affecting all of
  NetView's command processing.
  

Problem conclusion

• DSIMIGIT is being changed to set the number of queued commands
  that causes throttling to take place to be higher than any that
  could occur. This, in effect, eliminates the throttling of MVS
  messages because of queued commands.
  

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:

  OA44302 UA72156

Modules/Macros

• DSIMIGIT
  

Fix information

• Fixed component name

  NETVIEW FOR Z/O

• Fixed component ID

  5697NV600

Applicable component levels

• R10B PSY UA72156

     UP14/02/23 P F402

Fix is available

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