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DB2 - Problembeschreibung

Problem IT06173 Status: Geschlossen

DB2 SERVER MEMORY LEAK IN APPLICATION HEAP WHEN PROCESSING LOB DATA IN A
DPF ENVIRONMENT

Produkt:
DB2 FOR LUW / DB2FORLUW / A50 - DB2
Problembeschreibung:
A small amount of memory is leaked in the application heap for 
each row processed where LOB or Long Field data is sent between 
partitions in a DPF (Database-partitioning feature) environment. 
The leak occurs on the coordinator partition only, and is 
released when the connection is terminated as the entire 
application heap is freed.  DB2 levels version 10.1 GA and 10.5 
GA and higher are vulnerable. 
 
Besides monitoring application heap memory pools for abnormal 
usage with standard memory monitoring tools (eg. 
MON_GET_MEMORY_POOL), the leak symptom can be matched by running 
the following command. 
db2pd -alldbs -memblocks appl 1 | grep 896367698 
 
0x0A00020000052EA8 0x0A00020000052EC0 1          apph 
508   24           1 2008  896367698 
0x0A00020000052EE8 0x0A00020000052F00 1          apph 
513   24           1 2008  896367698 
0x0A00020000052F28 0x0A00020000052F40 1          apph 
518   24           1 2008  896367698 
0x0A00020000052F68 0x0A00020000052F80 1          apph 
523   24           1 2008  896367698 
... 
 
If there are a large number of records where the 6th column is 
"24" (meaning 24 bytes) and the last column is "896367698", this 
is matching the symptoms of the leak in this APAR.
Problem-Zusammenfassung:
**************************************************************** 
* USERS AFFECTED:                                              * 
* DB2 systems using DPF (data-partitioning feature)            * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 10.5 Fix Pack 7                       * 
****************************************************************
Local-Fix:
force off applications with abnormally high application heap 
memory usage to release leaked memory
Lösung
Problem first fixed in DB2 Version 10.5 Fix Pack 7
Workaround
see Local Fix
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
18.12.2014
16.02.2016
16.02.2016
Problem behoben ab folgender Versionen (IBM BugInfos)
Problem behoben lt. FixList in der Version
10.5.0.7 FixList