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During "Online" DDL, Some DML Waits On Semaphore Last Locked In "btr0bulk.cc line 53" (Doc ID 2480928.1)

Last updated on MARCH 14, 2019

Applies to:

MySQL Server - Version 5.7 and later
Information in this document applies to any platform.

Goal

Problem
----------------

An otherwise non-locking ALTER TABLE .. ADD KEY leads to an expected long semaphore wait near the end.
InnoDB status show it like this: (note: btr0bulk.cc line 53 )

Solution

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In this Document
Goal
Solution
References


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