DB2 FOR LUW / DB2FORLUW / 970 - DB2

On Linux RHEL6 64b machine , db2start might fail with SQL1042 . 
 
The inspection of db2diag.log shows up the following error 
messages: 
 
2011-03-16-08.33.34.866971-240 I9773E357 LEVEL: Severe 
PID : 31293 TID : 140328380831520PROC : 
db2star2 
INSTANCE: db2inst1 NODE : 000 
FUNCTION: DB2 UDB, base sys utilities, DB2StartMain, probe:580 
MESSAGE : ECF=0x900003DE=-1879047202=ECF_TRCAPI_MUTEX_LOCK_ERROR 
Trace facility mutex unexpected lock error 
 
Additional background about the error: The problem occurs 
because RHEL6 has low default IPC kernel parameters. During 
starting an instance, on Linux db2 increases the required IPC 
kernel parameters , but this increase occurs relatively late in 
the startup cycle and doesn't affect all created IPC resources . 
The second attempt to start an instance uses the new increased 
the IPC kernel parameters and it fixes the issue.

**************************************************************** 
* USERS AFFECTED:                                              * 
* Linux 64b only , RHEL6 in particular                         * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* On  Linux RHEL6 64b machine , db2start might fail with       * 
* SQL1042 .                                                    * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* The second attempt to start the instance should fix the      * 
* issue                                                        * 
****************************************************************

Several fixes are possible: 
a. Before starting up an instance , preset SHMMAX kernel 
parameter to 256MB 
b. A second attempt of db2start would fix the issue

DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
 DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
 

keiner bekannt / siehe Local-Fix

Vorgänger  : APAR is sysrouted TO one or more of the following: IC76895 
Nachfolger : 

Datum - Problem gemeldet    :
Datum - Problem geschlossen :
Datum - der letzten Änderung:

09.06.2011
27.03.2012
27.03.2012