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Analyzing 'enq: HW - contention' Wait Event (Doc ID 740075.1)

Last updated on FEBRUARY 28, 2023

Applies to:

Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Exadata Express Cloud 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
Oracle Database - Enterprise Edition - Version 9.2.0.1 and later
Information in this document applies to any platform.


Symptoms

1. There is a performance slow down with a large number of waits for 'enq HW - contention'.

2. ASH Reports shows the wait event 'enq HW - contention' which includes SQL with LOB Objects.

Cause

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In this Document
Symptoms
Cause
Solution
References

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