|
Problem IT22757
|
Status: Closed |
DB2 MIGHT SEEM TO HANG DURING QUERY COMPILATION
|
| product: |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 |
| Problem description: |
Db2 might seem to hang or take a very long time to complete
during query compilation.
An example stack trace seen in this scenario appears below:
Stack Trace:
------FUNCTION------
...
sqlno_kc_func_colcountP13sqlno_globalsP9sqlnq_qncP9sqlnq_pid22SQ
LNO_SET_EFF_COLCOUNTPP9sqlno_qncPf
sqlno_kc_get_eff_colcountP13sqlno_globalsP9sqlno_qnc22SQLNO_SET_
EFF_COLCOUNTPS2_Pf
sqlno_kc_func_colcountP13sqlno_globalsP9sqlnq_qncP9sqlnq_pid22SQ
LNO_SET_EFF_COLCOUNTPP9sqlno_qncPf
sqlno_kc_get_eff_colcountP13sqlno_globalsP9sqlno_qnc22SQLNO_SET_
EFF_COLCOUNTPS2_Pf
sqlno_kc_func_colcountP13sqlno_globalsP9sqlnq_qncP9sqlnq_pid22SQ
LNO_SET_EFF_COLCOUNTPP9sqlno_qncPf
sqlno_kc_get_eff_colcountP13sqlno_globalsP9sqlno_qnc22SQLNO_SET_
EFF_COLCOUNTPS2_Pf
sqlno_kc_func_colcountP13sqlno_globalsP9sqlnq_qncP9sqlnq_pid22SQ
LNO_SET_EFF_COLCOUNTPP9sqlno_qncPf
sqlno_kc_get_eff_colcountP13sqlno_globalsP9sqlno_qnc22SQLNO_SET_
EFF_COLCOUNTPS2_Pf
...
sqlno_kc_func_colcountP13sqlno_globalsP9sqlnq_qncP9sqlnq_pid22SQ
LNO_SET_EFF_COLCOUNTPP9sqlno_qncPf
sqlno_kc_get_eff_colcountP13sqlno_globalsP9sqlno_qnc22SQLNO_SET_
EFF_COLCOUNTPS2_Pf
sqlno_int_order_optimizeP13sqlno_globalsP9sqlno_qtbP16sqlno_list
header
sqlno_plan_begin_oprP13sqlno_globalsP9sqlno_sfbP9sqlnq_opr
sqlno_each_oprP13sqlno_globalsP9sqlno_sfbP9sqlnq_qunP9sqlnq_opr
sqlno_walk_qunP13sqlno_globalsP9sqlno_sfbP9sqlnq_oprP9sqlnq_qun
sqlno_each_oprP13sqlno_globalsP9sqlno_sfbP9sqlnq_qunP9sqlnq_opr
sqlno_top_qtbP13sqlno_globalsP9sqlno_sfbP9sqlnq_qurP9sqlnq_qtb
sqlno_each_qurP13sqlno_globalsP9sqlno_sfbP9sqlnq_qurS4_
sqlno_scan_qgmP13sqlno_globalsP9sqlno_sfbP9sqlnq_qur
sqlno_planning_scanP13sqlno_globalsP9sqlnq_quri
sqlno_planning_phaseP13sqlno_globalsP9sqlnq_qurii
sqlno_exeP9sqlnq_qur
... |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* See Local Fix *
**************************************************************** |
| Local Fix: |
Set this registry variable via db2set:
DB2_REDUCED_OPTIMIZATION=NO_ORD_COLS
Or via REGISTRY guideline: |
| Solution |
|
| Workaround |
not known / see Local fix |
| BUG-Tracking |
forerunner :
follow-up : IT22775 |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 11.10.2017
14.08.2020
14.08.2020 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
