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DB2 - Problembeschreibung

Problem IC73341 Status: Geschlossen

BACKUP PERFORMANCE DEGRADATION UPGRADING TO 9.1 FP8+ FROM 9.1 FP7

Produkt:
DB2 FOR LUW / DB2FORLUW / 910 - DB2
Problembeschreibung:
Backup Performance may degrade after applying 9.1 Fix Pack 8 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 FP8+ compared to FP7. 
 
For example, In one case: 
Fix Pack "7" : 
 
Autonomic backup/restore - using parallelism = 12. 
 
Using buffer size = 3328, number = 24 
 
 
 
 
Fixpak "9" : 
 
Autonomic backup/restore - using parallelism = 2. 
 
Using buffer size = 4096, number = 4.
Problem-Zusammenfassung:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All users running backup and choosing defaults by DB2 for    * 
* parallelism and buffer size parameters.                      * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* Backup Performance may degrade after upgrading to 9.1 FP8+   * 
* from 9.1 FP7                                                 * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Please upgrade to Fix pack 11 or greater containing the fix  * 
****************************************************************
Local-Fix:
Run the Backup command specifying explicit values for 
Parallelism and Buffer Size.
verfügbare FixPacks:
DB2 Version 9.1 Fix Pack 11  for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12  for Linux, UNIX and Windows

Lösung
Please upgrade to a Fix pack containing the fix
Workaround
keiner bekannt / siehe Local-Fix
Bug-Verfolgung
Vorgänger  : APAR is sysrouted TO one or more of the following: IC78936 IC78937 
Nachfolger : 
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
16.12.2010
13.12.2011
13.12.2011
Problem behoben ab folgender Versionen (IBM BugInfos)
Problem behoben lt. FixList in der Version
9.1.0.11 FixList