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Wnnn Process Encounters ORA-07445[lmebucp()+28] Repopulating In-Memory Table (Doc ID 2097783.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 12.1]
Information in this document applies to any platform.


Different problems related to in-memory table are encountered on

Symptom 1:

Wnnn process (Space job slave background process) crashed while repopulating in-memory table with error

ORA-07445 [lmebucp()+28]

The call stack from the trace file shows functions like:

... lmebucp kdzc_repop_create_dict_from_basic kdzc_create_dict_from_basic kdzc_get_column_info_imc_format kdzc_get_column_info_basic_imc_format kdzc_get_column_info kdzc_comp_unit kdzcompress kdmlCreateCU kdml_merge_CU kdmlRepopulateIMCU kdmlLoadIMCU kdmrIMCLOAD_cb ktsj_task_switch ktsj_execute_task ktsj_slave_main ksvrdp opirip opidrv ...

Symptom 2:

In-Memory query returns wrong value on specific column.
The wrong result can be avoided after the in-memory table is repopulated.


Bundle patch DBBP or later is applied on top of


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