ORA-00060 Deadlock Due to Missing Indexes on Foreign Key Constraints Occurs in Oracle 11g R2 But Not in 10g
(Doc ID 1570285.1)
Last updated on FEBRUARY 20, 2019
Applies to:Oracle Database - Enterprise Edition - Version 184.108.40.206 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
- ORA-00060 Deadlock occurs on 11g, but not in 10g/9i.
- Involved tables have foreign key constraints that are unindexed.
- Example scenario:
Session 1: insert into table1 (no commit)
Session 2: update table2 (table2 has a foreign key column reference to table1)
Result: In 11g Session1 blocks Session2 but in 9i/10g this does not occur.
Database was upgraded to 11g
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