High Waits on 'enq: RC - Result Cache: Contention' when Results are Updated Frequently
(Doc ID 1623225.1)
Last updated on OCTOBER 31, 2019
Applies to:
Oracle Database Exadata Cloud Machine - Version N/A and laterOracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
- The wait event 'enq: RC - Result Cache: Contention' is high in the "Top 5 Timed Foreground Events":
Waits Time(s) Avg wait (ms) % DB time Wait Class DB CPU 2,960 41.38 reliable message 1,379,183 1,884 1 26.34 Other enq: RC - Result Cache: Contention 769,697 1,341 2 18.75 Application enq: HW - contention 4,498 482 107 6.74 Configuration enq: TX - row lock contention 361 193 534 2.70 Application
Changes
Some query results have been stored in the Result Cache. The relevant tables are updated frequently.
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |