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MF63723 - OSP-PERFM QDBFSTCCOL GENERATING HIGH I/O TO DBPMSERVER TASKS

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

OSP-PERFM QDBFSTCCOL GENERATING HIGH I/O TO DBPMSERVER TASKS


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
CO   5770999  V7R2M0    MF63666   00/00    0000
CO   5770999  V7R2M0    MF63667   00/00    0000
CO   5770999  V7R2M0    MF63669   00/00    0000
CO   5770999  V7R2M0    MF62002   00/00    0000
CO   5770999  V7R2M0    MF61762   00/00    0000
CO   5770999  V7R2M0    MF61479   00/00    0000
CO   5770999  V7R2M0    MF59839   00/00    0000
CO   5770999  V7R2M0    MF59840   00/00    0000
CO   5770999  V7R2M0    MF59275   00/00    0000
CO   5770999  V7R2M0    MF59291   00/00    0000
CO   5770999  V7R2M0    MF58279   00/00    0000
CO   5770999  V7R2M0    MF57843   00/00    0000
CO   5770999  V7R2M0    MF57746   00/00    0000



NOTICE:
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APAR Error Description / Circumvention

-----------------------------------------------
QDBFSTCCOL generating high I/O to DbpmServer Tasks producing a
system slowdown.

CORRECTION FOR APAR MA46436 :
-----------------------------
Code is being added to change the behavior of the QDBFSTCCOL
job, along with corresponding DbpmServer tasks, in regards to
how they handle statistic collections over column with AUX data.
These changes specifically target the number of threads / tasks
to be used and the IO page size being used for scanning the
table.

CIRCUMVENTION FOR APAR MA46436 :
--------------------------------
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
--------------  ------------------------------------------------------------
   MF63668      LIC-DB-OTHER-PERFM SQL Limit/Offset support
   MF63510      LIC-DB-OTHER-WAIT Job hung in TIMW with DbpmMutex in stack a
   MF63288      LIC-DB-OTHER-WAIT Job hung in TIMW with DbpmMutex in stack a
   MF62687      LIC-OTHER-WAIT PROCESS CAN BE BLOCKED FROM DISPATCHING UNDER
   MF62360      OSP-DB-OTHER-F/DBPMDSPACCESS-T/QDBGETMQO-MSGMCH3402 MCH3402
   MF62229      LIC-DB-OTHER-PERFM Internal Database Maintenance
   MF62011      OSP-DB-OTHER-UNPRED TEMPORARY STORAGE MAY OCCASIONALLY BE OR
   MF61763      LIC-OTHER-LOOP JOB RUNNING DB QUERY WON'T END EVEN AFTER END
   MF61706      LIC-DB-OTHER-PERFM DBPMSERVER TASK CAUSING CONTENTION DUE TO
   MF61480      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF61222      LIC-DB-OTHER-LOOP a query accessing a table that is being re
   MF60614      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF60506      OSP-DB scaling changes
   MF60002      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF59836      LIC-DB-OTHER-UNPRED Enable logging of page header mismatch f
   MF59713      LIC-DB-OTHER-INCORROUT SQE native key next or previous equal
   MF59586      LIC-DB-OTHER-INCORROUT Positioning using a partial key in so
   MF59253      OSP-DB-OTHER-F/SMSEGMENTADDRESSRANGESTATUS-T/QDBGETMQO- MSGM
   MF59083      LIC-DB-OTHER-PERFM Performance improvements for SQE EVI Acce
   MF58640      LIC-DB-OTHER-PERFM Query performing a large sort in overcomm
   MF58281      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF58049      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF57725      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF57745      LIC-DB Prevent masked constraint Enablement
   MF57653      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF57616      OSP-DB-OTHER-INCORROUT An MTI initially created over an empt
   MF57844      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF57652      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF59279      OSP-DB-OTHER-PERFM SCAN OF EVI OVERFLOW AREA CAUSES PERFORMA

Summary Information

System..............................i
Models..............................
Release.............................V7R2M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA46436
Superseded by:......................View fix details for PTF MF68691
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C7290720


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Document Information

Modified date:
07 June 2021