VM66381: TIMEOUT AND TIMING PROBLEMS WITH Z/VM SMAPI

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Systems Management tools such as ICIC often generate very heavy
  traffic to the directory manager.  This leads to an increase in
  SMAPI caused asynchronous responses and the failure of those
  directory manager calls.
  
  Additionally, SMAPI formatted user cache processing leads to a
  significant increase in SMAPI initialization.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All users of the z/VM Systems Management     *
  *                 Application Programming Interfaces (SMAPI)   *
  *                 are affected by this change.                 *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  Two problems are addressed with this change.
  
  Systems Management tools such as ICIC often generate very heavy
  traffic to the directory manager. This has lead to an increase
  in SMAPI caused asynchronous responses (RC=592) because SMAPI
  only waits 15 seconds for a Directory Manager call not normally
  expected to return a Directory Manager operation id.
  
  The SMAPI formatted user cache processing causes a large
  increase in SMAPI cache initialization. Initialization times can
  be multiple minutes and even longer. Additionally, the
  processing associated with user creations, deletions, and
  changes consumes a large amount of time.
  

Problem conclusion

• To correct the first problem, the default wait for the Directory
  Manager is increased from 15 seconds to 50 seconds. This keeps
  the wait under the 1 minute threshold some systems management
  tools use. The 50 second wait will only occur if DirMaint is
  overwhelmed.
  
  To correct the second problem, the SMAPI formatted user cache
  processing and the group cache processing are disabled. This has
  shown to reduce SMAPI cache initialization by multiple orders of
  magnitude. The processing associated with user creations,
  deletions, and changes is also significantly reduced. The
  processing of large queries (that is, queries that run against
  multiple machines) is very significantly reduced, often by at
  least an order of magnitude.
  

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:

  UM35649

Modules/Macros

• DMSRSANC DMSSIDM  DMSSJDMC DMSSLCCI DMSSUPDC
  

Fix information

• Fixed component name

  VM CMS

• Fixed component ID

  568411201

Applicable component levels

• R710 PSY UM35649

     UP20/05/07 I 1000

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.