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MF66890 - LIC-OTHER-UNPRED CHANGE OF PACING DEFAULTS FOR UNMAPPING FRE

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

LIC-OTHER-UNPRED CHANGE OF PACING DEFAULTS FOR UNMAPPING FRE


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
TR   5770999  V7R4M0    MF99301   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

-----------------------------------------------
There is an internal SMFSUNMAP_WORKER task(s) that is currently
being used when IBMi is connected to SVC based external storage
to help open up actual free space on the external storage luns.
This worker task can be quite agressive in some environments,
therefore a code change is going to be a result of this APAR
which will change the default pacing behavior by this task and
allow the ability to modify if needed through an Advanced
Analysis Macro.

CORRECTION FOR APAR MA48078 :
-----------------------------
The default pacing behavior will be changed to slow the task
down.

CIRCUMVENTION FOR APAR MA48078 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


An IPL is required to pick up the new defaults.


Default Instructions

THIS PTF CAN BE APPLIED IMMEDIATE OR DELAYED.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF66829      LIC-OTHER-INCORROUT ADVANCED ANALYSIS MACRO SMFREESPACEUNMAP
   MF66427      LIC-OTHER Additional Debug Support

Summary Information

System..............................i
Models..............................
Release.............................V7R4M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA48078
Superseded by:......................View fix details for PTF MF99304
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C0121740


IBM i Support

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Document Information

Modified date:
03 March 2021