IT37436: DATABASE CREATE FAILS WITH SQL2049N RC=2 WHEN DB2_DATABASE_CF_MEMORY BEING SET TO 0

Db2 Version 11.1 Mod 4 Fix Pack 7 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• Customer observed SQL2049N rc=2 when setting
  DB2_DATABASE_CF_MEMORY  equal to 0.
  
  As per the documentation link below, the expected behavior when
  DB2_DATABASE_CF_MEMORY is set to 0, and cf_db_mem_sz is set to
  automatic is that the database should be created with the
  smallest possible size of 32,768 4K pages.
  
  https://www.ibm.com/docs/en/db2/11.5?topic=configuration-cf-memo
  ry-parameter
  
  Instead what we see is the SCA is assigned a value of ~800GB,
  which on most systems will lead to SQL2049N rc=2
  
  021-05-27-18.22.28.304184-240 E138651E1289          LEVEL:
  Severe
  PID     : 16415                TID : 140580524910336 PROC :
  db2sysc 0
  INSTANCE: db2inst1               NODE : 000            DB   :
  SAMPLE
  APPHDL  : 0-59                 APPID: *N0.db2inst1.210527222227
  AUTHID  : DB2INST1               HOSTNAME: localhost
  EDUID   : 31                   EDUNAME: db2agnts 0
  FUNCTION: DB2 UDB, Shared Data Structure Abstraction Layer for
  CF, SAL_MANAGEMENT_PORT_HANDLE::SAL_ManagementAllocateOneStruct,
  probe:7974
  MESSAGE : CA RC= 2147879427
  DATA #1 : String, 61 bytes
  CF structure allocation exception (structType,target_sz,SID):
  DATA #2 : SAL Structure Type, PD_TYPE_SAL_STRUCT_TYPE, 8 bytes
  Structure type 2 : sca
  DATA #3 : unsigned integer, 4 bytes
  204256256
  

Local fix

• Unset DB2_DATABASE_CF_MEMORY, restart the pureScale instance.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * all                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to 11.1 FP7 or later                                 *
  ****************************************************************
  

Problem conclusion

• Upgrade to 11.1 FP7 or later
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  IT39233

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• RB10 PSN

     UP