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MF65778 - OSP-DB-OTHER-UNPRED ALLOWS FOR AUTOMATIC RECOVERY OF THE CON

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

OSP-DB-OTHER-UNPRED ALLOWS FOR AUTOMATIC RECOVERY OF THE CON


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
CO   5770999  V7R3M0    MF65593   00/00    0000
CO   5770999  V7R3M0    MF65515   00/00    0000
CO   5770999  V7R3M0    MF63776   00/00    0000
CO   5770999  V7R3M0    MF62832   00/00    0000



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the 'IBM License Agreement for Machine
Code', the terms of which were provided in a printed document that was
delivered with the machine.

SUBJECT TO ANY WARRANTIES WHICH CAN NOT BE EXCLUDED OR EXCEPT AS EXPLICITLY
AGREED TO IN THE APPLICABLE LICENSE AGREEMENT OR AN APPLICABLE SUPPORT
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
The query optimizer tries to prevent itself from using too many
resources when many jobs submit the same complex query
simultaneously.  Rather than separately optimizing each one,
only a few concurrent optimizations are allowed, while the other
jobs will wait on those results and potentially re-use the
plans.

If something fails in this gating code, this support is
automatically disabled, which can lead to problems on busy
systems with very complex queries.

CORRECTION FOR APAR MA47450 :
-----------------------------
If the concurrent optimization support is disabled for some
reason (unexpected failure), the optimizer will attempt to
re-start it automatically after the problematic job(s) complete.

CIRCUMVENTION FOR APAR MA47450 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF65720      LIC-DB-OTHER Add number of mapping errors to SQL Plan Cache
   MF65626      LIC-DB-OTHER-PERFM SQE PLANCACHE TASK NO LONGER RESPONDING
   MF65592      LIC-DB-OTHER-PERFM ACCESSING SQE TOOLING CAUSES MACHINE GATE
   MF65592      LIC-DB-UNPRED Collection Services - QAPMSQLPC - SQPLNPRUN
   MF65592      LIC-DB-UNPRED SQE Plan Score
   MF65592      LIC-DB-OTHER Add new properties to SQL Plan Cache
   MF65516      LIC-DB-OTHER Internal maintenance
   MF65506      OSP-UNPRED PLAN CACHE GATING
   MF65489      OSP-PAR CONCURRENT OPTIMIZATION SUPPORT GETS DISABLED/ENDED
   MF65334      LIC-DB-OTHER IMPROVE SQE TARGETED TRACING
   MF65043      OSP-PAR-940XMISC PLANS THAT MAY BE IN USE FROM JOBS IN ONE P
   MF64768      LIC-DB-OTHER Internal Maintenance
   MF64768      LIC-DB-OTHER Delete specific plan via QQQOOOCACH
   MF64527      LIC-DB-OTHER PERFORMANCE ISSUE WHEN MAKING CHANGES TO AUTO P
   MF64317      LIC-DB-OTHER Internal maintenance
   MF64219      LIC-DB-PERFM Change to SQE Plan Cache Auto-sizing enablement
   MF63775      OSP-DB-OTHER-INCORROUT DUMP OF PLAN CACHE SHOWS INCORRECT OU
   MF63147      LIC-DB-OTHER-INCORRECT INAVIGATOR PLAN CACHE ANALYSIS OF ACC
   MF62976      LIC-DB-OTHER-INCORROUT LAST TIME USED VALUES DIFFER IN PLAN
   MF62902      LIC-DB-INCORROUT Temporary Storage on Plan Cache Properties
   MF62822      LIC-DB-OTHER-PERFM JOBS ACCESSING A DAMAGE FILE WILL NOT END
   MF61854      LIC-DB-PERFM JOB HOLDING A GATE FOR DBOP PLAN CACHE
   MF62833      LIC-DB-OTHER-PERFM Reduce the system overhead for QSYS2/SYSI
   MF62824      LIC-DB-OTHER-PERFM SYSTEM TASK DBOP-PLANCACHE USING CPU.
   MF62515      LIC-DB-OTHER Unable to VE very complex plan from Plan Cache
   MF62381      LIC-DB-OTHER Internal Maintenance
   MF62183      LIC-DB-OTHER-THREADS-PERFM SYSTEM PERFORMANCE AFFECTED BY AQ
   MF61876      LIC-DB-OTHER ACTIVATE SQE TEMP STORAGE MANAGEMENT FUNCTION
   MF61876      LIC-DB-OTHER-PERFM PLAN CACHE AUTOSIZING
   MF61876      LIC-DB-OTHER-UNPRED SQE ROQ USAGE IN PLAN CACHE GROWING DAIL
   MF61711      LIC-DB-OTHER Internal database maintenance
   MF61219      OSP-INCORROUT VISUAL EXPLAIN 3 OF TIMESTAMPS ARE INCORRECT.
   MF61189      LIC-DB-OTHER-UNPRED QUERY/400 MAY USE LARGE AMOUNTS OF TEMPO

Summary Information

System..............................  i
Models..............................  
Release.............................  V7R3M0
Licensed Program....................  5770999
APAR Fixed..........................  View details for APAR MA47450
Superseded by:......................  View fix details for PTF MF71219
Recompile...........................  N
Library.............................  QSYS
MRI Feature ........................  NONE
Cum Level...........................  C9311730


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Document Information

Modified date:
13 September 2023