As a MySQL database administrator, you’re likely familiar with the SHOW REPLICA STATUS command. It is an important command for monitoring the replication status on your MySQL replicas. However, its output can be overwhelming for beginners, especially regarding the binary log coordinates. I have seen confusion amongst new DBAs on which binary log file and position represent what in the replication.
In this guide, we’ll simplify the SHOW REPLICA STATUS output, focusing on the critical binary log coordinates essential for troubleshooting and managing replication.
The key binlog coordinates
Before we delve into the output, let’s understand the key binlog coordinates we’ll be working with:
- Master_Log_File: This is the name of the primary binary log file that the I/O thread is currently reading from.
- Read_Master_Log_Pos: It represents the …