IT18310: ADDITIONAL CALLS IN AGENT BREATHING POINT CAUSE POOR PERFORMANCEIN LOAD UTILITY

DB2 Version 11.1 Mod 2 Fix Pack 2 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod2 Fix Pack2 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod2 Fix Pack2 iFix002 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 3 Fix Pack 3 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix001 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod3 Fix Pack3 iFix002 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod4 Fix Pack4 iFix001 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• Excessive looping in Agent Breathing Point causes poor
  performance in the LOAD utility and may make the utility appear
  to hang.
  
  To identify, threads may be in this stack:
  0x0900000068096D0C sqldReadTemp__FP13SQLD_DFM_WORKl + 0x38C
  0x09000000677F8E94 @114@sqldFetchNext__FP13SQLD_DFM_WORK + 0x18
  0x0900000068312C24 sqldfrd__FP13SQLD_DFM_WORK + 0x1188
  0x0900000067971C74
  sqldRowFetch__FP8sqeAgentP8SQLD_CCBUlT3PP10SQLD_VALUEP8SQLZ_RIDT
  3P12SQLD_ID_LISTP9SQLP_LSN8 + 0x374
  0x09000000656E6284
  sqlsfetc__FP8sqeAgentP8SQLD_CCBiP10SQLD_DPREDPP10SQLD_VALUEP8SQL
  Z_RIDPc@OL@23909 + 0x700
  0x090000006708ABF4
  sqlsfetc__FP8sqeAgentP8SQLD_CCBiP10SQLD_DPREDPP10SQLD_VALUEP8SQL
  Z_RIDPc + 0xA4
  0x0900000066A5EDD4 sqluDMSortFetch__FPUcP4svalT1Pii + 0x80C
  
  and Trace timings will show that LOAD is in the INDEX BUILD
  phase.
  

Local fix

• We can set DB2_ROWCOMP_TEMP=disable=util and it will avoid this
  area of looping.  Please keep in mind that setting this variable
  will make some changes in the internal compression used in
  utilities such as LOAD and REORG.  While their overall
  performance will be the same, setting this variable will mean
  that they require additional TEMP space.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to DB2 11.1 Fix Pack 2                               *
  ****************************************************************
  

Problem conclusion

• First Fixed in DB2 11.1 Fix Pack 2
  

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:

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels