DB2 FOR LUW / DB2FORLUW / 950 - DB2

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.

**************************************************************** 
* 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              * 
****************************************************************

Run the Backup command specifying explicit values for 
Parallelism and Buffer Size.

DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows
 DB2 Version 9.5 Fix Pack 10 for Linux, UNIX, and Windows
 

Problem first fixed in DB2 Version 9.5 Fix Pack 9

not known / see Local fix

Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

27.09.2011
12.03.2012
12.03.2012

9.5.FP9