Performance Schema Replication Tables replication_applier_status  Column SHOW REPLICA | SLAVE STATUS  Column SERVICE_STATE None REMAINING_DELAY SQL_Remaining_Delay 27.12.11.7 The replication_applier_status_by_coordinator Table For a multithreaded replica, the replica uses multiple worker threads and a coordinator thread to manage them, and this table shows the status of the coordinator thread. For a single-threaded replica, this table is empty. For a multithreaded replica, the  replication_applier_status_by_worker  table shows the status of the worker threads. This table provides information about the last transaction which was buffered by the coordinator thread to a worker’s queue, as well as the transaction it is currently buffering. The start timestamp refers to when this thread read the first event of the transaction from the relay log to buffer it to a worker’s queue, while the end timestamp refers to when the last event finished buffering to the worker’s queue. The  replication_applier_status_by_coordinator  table has these columns: The replication channel which this row is displaying. There is always a default replication channel, and more replication channels can be added. See Section 17.2.2, “Replication Channels”  for more information. The SQL/coordinator thread ID. ON  (thread exists and is active or idle) or  OFF  (thread no longer exists). The error number and error message of the most recent error that caused the SQL/coordinator thread to stop. An error number of 0 and message which is an empty string means “no error” . If the LAST_ERROR_MESSAGE  value is not empty, the error values also appear in the replica’s error log. Issuing  RESET MASTER  or  RESET REPLICA | SLAVE  resets the values shown in these columns. All error codes and messages displayed in the  LAST_ERROR_NUMBER  and  LAST_ERROR_MESSAGE columns correspond to error values listed in Server Error Message Reference. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the most recent SQL/coordinator error occurred. The global transaction ID (GTID) of the last transaction processed by this coordinator. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the last transaction processed by this coordinator was committed on the original source. 5010 • LAST_PROCESSED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP • LAST_PROCESSED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP • LAST_PROCESSED_TRANSACTION • LAST_ERROR_TIMESTAMP • LAST_ERROR_NUMBER ,  LAST_ERROR_MESSAGE • SERVICE_STATE • THREAD_ID • CHANNEL_NAME