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DB2 - Problembeschreibung

Problem IC84204 Status: Geschlossen

DB2 MAY NOT PERFORM OPTIMALLY ON LARGE 64-BIT WINDOWS ENVIRONMENTS DUE TO
USE OF MEM_TOP_DOWN FLAG

Produkt:
DB2 FOR LUW / DB2FORLUW / A10 - DB2
Problembeschreibung:
DB2 uses the MEM_TOP_DOWN flag for many memory allocations 
(VirtualAlloc API) on the Windows platform.  The use of this 
flag causes memory allocations to take longer as the number of 
allocations gets larger.  The MEM_TOP_DOWN flag is used 
primarily to avoid address space fragmentation in 32-bit 
environments, and is not needed with 64-bit, so its use will be 
restricted to 32-bit DB2. 
 
The symptom may be particularly noticable when initializing 
large bufferpools. 
 
A workaround exists, that is to set the following internal 
registry variable: 
  db2set DB2_MEMALLOCATE_HIGH=NO 
The instance must be recycled with db2stop; db2start
Problem-Zusammenfassung:
**************************************************************** 
* USERS AFFECTED:                                              * 
* Large systems running DB2 on the Windows platform            * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Use the temporary workaround or upgrade to DB2 Version 10.1  * 
* Fix Pack 1.  If using the workaround, ensure the setting is  * 
* removed after upgrading to DB2 Version 10.1 Fix Pack 1 or    * 
* higher.                                                      * 
****************************************************************
Local-Fix:
db2set DB2_MEMALLOCATE_HIGH=NO 
The instance must be recycled with db2stop; db2start
verfügbare FixPacks:
DB2 Version 10.1 Fix Pack 1 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows

Lösung
First fixed in DB2 Version 10.1 Fix pack 1
Workaround
See Local Fix
Weitere Daten
Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
13.06.2012
02.11.2012
02.11.2012
Problem behoben ab folgender Versionen (IBM BugInfos)
Problem behoben lt. FixList in der Version
10.1.0.1 FixList
10.5.0.1 FixList