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MF66611 - OSP-MSGCPI0999 TMPSTGLK-STATIC DIRECTORY FRAGMENTATION WITH

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Abstract

OSP-MSGCPI0999 TMPSTGLK-STATIC DIRECTORY FRAGMENTATION WITH


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
CO   5770999  V7R2M0    MF66610   00/00    0000
CO   5770999  V7R2M0    MF65470   00/00    0000
CO   5770999  V7R2M0    MF64424   00/00    0000
CO   5770999  V7R2M0    MF61106   00/00    0000
CO   5770999  V7R2M0    MF58586   00/00    0000
CO   5770999  V7R2M0    MF59835   00/00    0000
CO   5770999  V7R2M0    MF59839   00/00    0000
CO   5770999  V7R2M0    MF57655   00/00    0000



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APAR Error Description / Circumvention

-----------------------------------------------
Production system crashed when static directory reached limit
for entries. Analysis showed that this was due to a long running
query with large allocations. Eventually, the static directory
became badly fragmented and could no longer satisfy an
allocation request, causing the system to terminate.

CORRECTION FOR APAR MA47952 :
-----------------------------
Certain flavors of queries with Cartesian joins that produce
massive result sets were resulting in relatively small storage
allocations, resulting in pressure on the temporary directory,
which in turn put pressure on the static directory, eventually
causing the system to reach a static directory limit and crash,
even though the actual storage used in the system ASP was not
yet at a critical level.

Changes were made to increase the extension size dynamically
reducing the impact on the directories for these types of
queries.  However, these types of queries can still have a major
impact on system resources and should be monitored closely or
prohibited to run on production systems.  In this case, the
query would have eventually consumed all storage in the system
ASP, unless manual intervention was performed or by setting the
Maximum temporary storage (MAXTMPSTG) job description parameter
appropriately.  The support enabling queries to honor MAXTMPSTG
may require the application of PTFs in older releases.

CIRCUMVENTION FOR APAR MA47952 :
--------------------------------
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
--------------  ------------------------------------------------------------
   MF66203      OSP-UNPRED NAVIGATOR FOR I MTIS DELETED COUNT IS INCORRECT
   MF65545      LIC-DB-OTHER-INCORROUT TIMING CONDITION DURING QUERY CANCELL
   MF65472      LIC-DB-OTHER-F/DBPMTRAP-T/QQQSRVE1-RC1720-MSGMCH3203 SQL que
   MF64427      LIC-DB-OTHER-F/DBPMRESOURCE-T/QDBGETMQO-RC1202-MSGMCH3203 VL
   MF64220      OSP-DB-OTHER-WAIT QUERY WAIT ON SMP THREAD MUTEX DBOP-PLANCA
   MF64054      OSP-DB A CURSOR WILL REMAIN IN A FAILED STATE IF TEMPORARY R
   MF63954      F/QDBIOERRQO-MSGCPF5257 QUERY FAILS INTERMITTENTLY USING SMP
   MF63459      SQL-RUN-WAIT SQL SELECT QUERIES HANG. THE JOBS REMAINED IN E
   MF62233      LIC-DB-OTHER-PERFM Internal Database Maintenance
   MF62121      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF58200      LIC-DB-UNPRED Index build status file 16 byte alignment
   MF61762      LIC-OTHER-LOOP JOB RUNNING DB QUERY WON'T END EVEN AFTER END
   MF61346      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF61223      LIC-DB-OTHER-LOOP a query accessing a table that is being re
   MF61105      LIC-DB-OTHER-F/DBPMTRAP-T/QQQOOOUPCL-RCX'1720'-MSGMCH3203 CR
   MF59999      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF59838      LIC-DB-OTHER-UNPRED Enable logging of page header mismatch f
   MF58866      LIC-DB-OTHER-F/QDBSIGEX-MSGCPF5040 Attempt to read by RRN fr
   MF57657      LIC-DB-OTHER-UNPRED Internal Database Maintenance
   MF59085      LIC-DB-OTHER-PERFM Performance improvements for SQE EVI Acce
   MF58643      LIC-DB-OTHER-PERFM Query performing a large sort in overcomm
   MF58585      LIC-DB-OTHER-PERFM An SQL CANCEL of an SMP query may take an
   MF57914      LIC-DB-OTHER-UNPRED Internal Database Maintenance

Summary Information

System..............................i
Models..............................
Release.............................V7R2M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA47952
Superseded by:......................
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C0114720


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Document Information

Modified date:
16 May 2020