My Oracle Support Banner

Long Semaphore Wait For Mutex Created in File dict0dict.cc and Locked in File dict0dict.cc When Querying a Table That Is Parent Of Many Foreign Keys (Doc ID 2039457.1)

Last updated on AUGUST 10, 2018

Applies to:

MySQL Server - Version 5.5 to 5.7 [Release 5.5 to 5.7]
Information in this document applies to any platform.

Symptoms

When a query triggers many foreign keys to read into the InnoDB data dictionary, and then executing another DDL or INSERT, UPDATE, DELETE, or similar query, an error similar to the following occurs:

 

This is most likely to be an issue in releases earlier than 5.5.39, 5.6.20, and 5.7.5.

Cause

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


In this Document
Symptoms
Cause
Solution
References


This document is being delivered to you via Oracle Support's Rapid Visibility (RaV) process and therefore has not been subject to an independent technical review.
My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.