MF58580 - LIC-DB-OTHER-PERFM SLOW PARTITION DUE TO CONCURRENT IDENTICA

TYPE PROGRAM  REL  NUMBER   MIN/MAX  OPTION
---- -------- ---  -------  -------  ------
PRE  5770999  710  MF56164   00/00    0000
CO   5770999  710  MF58507   00/00    0000
CO   5770999  710  MF56160   00/00    0000
CO   5770999  710  MF56188   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
AGREEMENT, IBM MAKES NO WARRANTIES OR CONDITIONS EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
Many concurrent identical optimizations compete for resources
which caused significant system performance problems.

CORRECTION FOR APAR MA43766 :
-----------------------------
The SQE optimizer will recognize when multiple identical
optimizations are required in the same time frame. When this
situation is identified, the optimizer will allow a subset of
optimizations to progress. Once the subset of optimizations
complete, the remaining optimizations attempt to match a plan
from the plan cache prior to continuing with the optimization.


CIRCUMVENTION FOR APAR MA43766 :
--------------------------------
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
--------------  ------------------------------------------------------------
   MF56390      SRCB6005121-HLIC-9406MISC SYSTEM TERMINATES WITH B6005121.
   MF56161      OSP-DB-OTHER-PERFM Enable SQL Performance metrics

Summary Information

System i Support