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DB2 - Problembeschreibung

Problem IC78936 Status: Geschlossen

BACKUP PERFORMANCE DEGRADATION UPGRADING TO 9.5 FP5+

Produkt:
DB2 FOR LUW / DB2FORLUW / 950 - DB2
Problembeschreibung:
Backup Performance may degrade after applying 9.5 Fix Pack 5 or 
greater when executing the Backup command without explicitly 
specifying the Parallelism and Buffer Values and when letting 
DB2 automatically compute the values. 
 
Automatic values chosen by DB2 when no parallelism or buffer 
size is explicitly chosen is lower in FP5+ compared to FP4. 
 
For example, In one case: 
Fix Pack "4" : 
 
Autonomic backup/restore - using parallelism = 12. 
 
Using buffer size = 3328, number = 24 
 
 
 
 
Fixpak "5" : 
 
Autonomic backup/restore - using parallelism = 2. 
 
Using buffer size = 4096, number = 4.
Problem-Zusammenfassung:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All DB2 Users running Backup with default parallelism and    * 
* buffer values                                                * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* see above                                                    * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 Version 9.5 Fix Pack 9 or higher              * 
****************************************************************
Local-Fix:
Run the Backup command specifying explicit values for 
Parallelism and Buffer Size.
verfügbare FixPacks:
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows

Lösung
Problem first fixed in DB2 Version 9.5 Fix Pack 9
Workaround
keiner bekannt / siehe Local-Fix
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
27.09.2011
12.03.2012
12.03.2012
Problem behoben ab folgender Versionen (IBM BugInfos)
9.5.FP9
Problem behoben lt. FixList in der Version
9.5.0.9 FixList