Use when a replica is reporting Seconds_Behind_Master > 0 and growing, replication appears stuck, slave_parallel_threads is not helping, or you need to measure actual replication lag. Prevents the common mistake of trusting Seconds_Behind_Master as a real-time metric, leaving a single-threaded appli
Use when a replica is reporting Seconds_Behind_Master > 0 and growing, replication appears stuck, slave_parallel_threads is not helping, or you need to measure actual replication lag. Prevents the common mistake of trusting Seconds_Behind_Master as a real-time metric, leaving a single-threaded applier on a legacy setup, long master-transactions creating cascading lag, or binlog_row_image=MINIMAL c