PTFs required for the creation and restoration of programs and service programs on V6R1

Date:12 March 2009
Product/Release:LANSA for iSeries
Abstract:Essential IBM PTFs required to improve performance when running OS V6R1
Submitted By:LANSA Technical Support

Description:

If you experienced significant performance degradation after upgrading to V6R1, it’s recommended to apply the V6R1 PTFs and follow their instructions to improve the performance. One such case experienced by our customer was when using complex SELECT_SQL statements in RDML.

If you are in the process of upgrading to V6R1, the PTFs are also suggested by IBM to avoid possible performance impact.

Solution:

Apply PTFs MF46183 and MF46307

Coversheet descriptions:

PTF/FIX #: MF46183 - Licensed Internal Code
LICENSED PROGRAM: 5761999
DESCRIPTION OF PROBLEM FIXED FOR APAR 'MA37477' :
-------------------------------------------------
Since going to R610 CPU has been higher than expected and the
end users have complained about response time. Client
application uses LANSA which uses OPM RPG programs. CFGRPBL
bzero_GenNaker appears to be the largest CPU consumer.
CORRECTION FOR APAR 'MA37477' :
-------------------------------
Revert to the previous release behavior for processing recycled
static storage for those MI program objects that have undergone
conversion after the apply of PTF MF46307.
PTF/FIX #: MF46307 - Licensed Internal Code
LICENSED PROGRAM: 5761999
DESCRIPTION OF PROBLEM FIXED FOR APAR MA37558 :
-----------------------------------------------
For programs and service programs created or converted on V6R1,
static initializers consisting of a string of zeros were not
generated. Instead, the activation of the program would clear
all static storage to zeros. In some cases this results in a
noticeable performance degradation.
See also APAR MA37477.
CORRECTION FOR APAR MA37558 :
-----------------------------
Licensed Internal Code has been altered to create program and
service program objects with the required zero initializers for
static storage. Activation of the new programs will perform
better when the PTF for APAR MA37477 is applied.
The affected programs must be either re-created or converted
after this PTF is applied.