MF56499 - LIC-DB-OTHER-PERFM PERFORMANCE DEGRADATION FOR LARGE DELETE

TYPE PROGRAM  REL  NUMBER   MIN/MAX  OPTION
---- -------- ---  -------  -------  ------
CO   5770999  710  MF53953   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

-----------------------------------------------
A delete statement which is deleting a large number of rows from
a large table over which indexes exist may experience a
performance degradation.

CORRECTION FOR APAR MA42536 :
-----------------------------
This PTF will limit the force of the recycle index during
periods of high activity to alleviate some of the performance
degradation.

CIRCUMVENTION FOR APAR MA42536 :
--------------------------------
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
--------------  ------------------------------------------------------------
   MF56077      LIC-DB-OTHER-LOOP DBIOXX CONSUMING CPU #DBRECYC, EOJ STUCK,
   MF53952      PERFM-LIC-DB EXCESSIVE I/O DURING DBMON ANALYSIS QUERY W/MAX
   MF51375      OSP-DB #dbrecyc diagnostics improved and recix max limit inc
   MF49873      OSP- MSGMCH1210-F/CBLABRANCH-T/QDBEXDME DSPFD GETS MCH1210

Summary Information

IBM i Support