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Multi-threaded Replication - Replica workers apply the changes very slow (Doc ID 2205048.1)

Last updated on MAY 06, 2021

Applies to:

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

Symptoms

Multi-threaded replicas are very slow, can't catch up the source.

No work load on on replica server. 

No warnings or errors in the MySQL error log.

In the innodb status report, transaction section, showing replica workers are in "ACTIVE (PREPARED)" status:

 These thread ids can be mapped to the replica workers.

 

Cause

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In this Document
Symptoms
Cause
Solution
References


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