Performance Schema Replication Tables A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the most recent heartbeat signal was received by a replica. The total number of heartbeat signals that a replica received since the last time it was restarted or reset, or a  CHANGE REPLICATION SOURCE TO  |  CHANGE MASTER TO  statement was issued. The global transaction ID (GTID) of the last transaction that was queued to the relay log. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the last transaction queued in the relay log was committed on the original source. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the last transaction queued in the relay log was committed on the immediate source. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the last transaction was placed in the relay log queue by this I/O thread. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the last transaction was queued to the relay log files. The global transaction ID (GTID) of the currently queueing transaction in the relay log. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the currently queueing transaction was committed on the original source. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the currently queueing transaction was committed on the immediate source. A timestamp in  ’ YYYY-MM-DD hh:mm:ss [. fraction ]’  format that shows when the first event of the currently queueing transaction was written to the relay log by this I/O thread. When the Performance Schema is disabled, local timing information is not collected, so the fields showing the start and end timestamps for queued transactions are zero. The  replication_connection_status  table has these indexes: 5005 • LAST_HEARTBEAT_TIMESTAMP • COUNT_RECEIVED_HEARTBEATS • LAST_QUEUED_TRANSACTION • LAST_QUEUED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP • LAST_QUEUED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP • LAST_QUEUED_TRANSACTION_START_QUEUE_TIMESTAMP • LAST_QUEUED_TRANSACTION_END_QUEUE_TIMESTAMP • QUEUEING_TRANSACTION • QUEUEING_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP • QUEUEING_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP • QUEUEING_TRANSACTION_START_QUEUE_TIMESTAMP •Primary key on ( CHANNEL_NAME )