Running DBMS_STATS.GATHER_TABLE_STATS Is Failing With An ORA-12805 And An ORA-07445 [Qesamsr2sorrecmerge] Is Reported In The Alert Log.
(Doc ID 875816.1)
Last updated on MAY 19, 2021
Applies to:Oracle Database Cloud Service - Version N/A and later
Oracle Database - Enterprise Edition - Version 10.2.0.3 to 184.108.40.206 [Release 10.2 to 11.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Information in this document applies to any platform.
When running DBMS_STATS.GATHER_TABLE_STATS with Parallelism, it fails with the below error:
ORA-12805: parallel query server died unexpectedly
And in the alert log, you see the error:
ORA-07445: exception encountered: core dump [qesaMSR2SorRecMerge()+224]
[SIGSEGV] [Address not mapped to object] [0xFFFFFFFF7883CE80]  
An example of the failing query gathering the statistics would be:
The Explain Plan would also show a lot of PX operations.
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