Master Note: Locks, Enqueues and Deadlocks
(Doc ID 1392319.1)
Last updated on MARCH 12, 2021
Applies to:
Oracle Database - Personal Edition - Version 7.1.4.0 and later Oracle Database - Enterprise Edition - Version 7.0.16.0 and later Oracle Database - Standard Edition - Version 7.0.16.0 and later Oracle Database Cloud Schema Service - Version N/A and later Oracle Database Exadata Cloud Machine - Version N/A and later Information in this document applies to any platform.
Purpose
This document provides an overview reference to content that pertains to the resolution of locks, enqueues and deadlocks affecting the database.
Whole Database "Locking up" or Hanging
If the whole database is "Locking up" or Hanging then this typically is not cause by lock contention and needs to be handled differently. If the database encounters what looks like a hang or a spin conditions refer to the following:
<Document 452358.1> How to Collect Diagnostics for Database Hanging Issues
Questions and Answers
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