Complex Insert Intermittently Slower on Partitioned Table as a Result of Cursor Invalidation
(Doc ID 2057107.1)
Last updated on AUGUST 29, 2022
Applies to:
Oracle Database - Enterprise Edition - Version 10.2.0.5 and laterOracle 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.
Symptoms
- DML query (insert, update,merge or delete) intermittently takes much longer to complete
- DML is performed on a partitioned table
- The query has the same plan for both slow and fast executions
- The amount of buffer gets is significantly higher (2 or 3 times higher) even though the amount of data being processed is the same
- V$ACTIVE_SESSION_HISTORY and V$SQL_MONITOR shows that the SQL_EXEC_ID for the sql_id increases even though it is executed only once
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |