Got the following nagios alert this morning for our MySQL replica:
14:49 PROBLEM: mysql2/MySQL replication check is CRITICAL, 10.1.0.133 is 72870 seconds behind, Aug 09, 21:49 UTC
When I look at SHOW SLAVE STATUS on the replica, the places I normally look at are fine:
Slave_IO_State: Waiting for master to send event
Seconds_Behind_Master: 73698
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Last_IO_Errno: 0
Last_SQL_Errno: 0
Where else should I be looking to diagnose and fix replication?