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26.12.11.2 The replication_connection_status Table
This table shows the current status of the I/O thread that handles the slave server connection to the master server, information on the last transaction queued in the relay log, and information on the transaction currently being queued in the relay log.
Compared to the
replication_connection_configuration
table,
replication_connection_status
changes more frequently. It contains values that change during
the connection, whereas
replication_connection_configuration
contains values which define how the slave connects to the
master and that remain constant during the connection.
The replication_connection_status
table has these columns:
CHANNEL_NAME
The replication channel which this row is displaying. There is always a default replication channel, and more replication channels can be added. See Section 17.2.3, “Replication Channels” for more information.
GROUP_NAME
If this server is a member of a group, shows the name of the group the server belongs to.
SOURCE_UUID
The
server_uuid
value from the master.THREAD_ID
The I/O thread ID.
SERVICE_STATE
ON
(thread exists and is active or idle),OFF
(thread no longer exists), orCONNECTING
(thread exists and is connecting to the master).RECEIVED_TRANSACTION_SET
The set of global transaction IDs (GTIDs) corresponding to all transactions received by this slave. Empty if GTIDs are not in use. See GTID Sets for more information.
LAST_ERROR_NUMBER
,LAST_ERROR_MESSAGE
The error number and error message of the most recent error that caused the I/O thread to stop. An error number of 0 and message of the empty string mean “no error.” If the
LAST_ERROR_MESSAGE
value is not empty, the error values also appear in the slave's error log.Issuing
RESET MASTER
orRESET SLAVE
resets the values shown in these columns.LAST_ERROR_TIMESTAMP
A timestamp in
'YYYY-MM-DD HH:MM:SS[.fraction]'
format that shows when the most recent I/O error took place.LAST_HEARTBEAT_TIMESTAMP
A timestamp in
'YYYY-MM-DD HH:MM:SS[.fraction]'
format that shows when the most recent heartbeat signal was received by a replication slave.COUNT_RECEIVED_HEARTBEATS
The total number of heartbeat signals that a replication slave received since the last time it was restarted or reset, or a
CHANGE MASTER TO
statement was issued.LAST_QUEUED_TRANSACTION
The global transaction ID (GTID) of the last transaction that was queued to the relay log.
LAST_QUEUED_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP
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 master.LAST_QUEUED_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP
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 master.LAST_QUEUED_TRANSACTION_START_QUEUE_TIMESTAMP
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.LAST_QUEUED_TRANSACTION_END_QUEUE_TIMESTAMP
A timestamp in
'YYYY-MM-DD HH:MM:SS[.fraction]'
format that shows when the last transaction was queued to the relay log files.QUEUEING_TRANSACTION
The global transaction ID (GTID) of the currently queueing transaction in the relay log.
QUEUEING_TRANSACTION_ORIGINAL_COMMIT_TIMESTAMP
A timestamp in
'YYYY-MM-DD HH:MM:SS[.fraction]'
format that shows when the currently queueing transaction was committed on the original master.QUEUEING_TRANSACTION_IMMEDIATE_COMMIT_TIMESTAMP
A timestamp in
'YYYY-MM-DD HH:MM:SS[.fraction]'
format that shows when the currently queueing transaction was committed on the immediate master.QUEUEING_TRANSACTION_START_QUEUE_TIMESTAMP
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:
Primary key on (
CHANNEL_NAME
)Index on (
THREAD_ID
)
The following table shows the correspondence between
replication_connection_status
columns and SHOW SLAVE STATUS
columns.
replication_connection_status Column |
SHOW SLAVE STATUS Column |
---|---|
SOURCE_UUID |
Master_UUID |
THREAD_ID |
None |
SERVICE_STATE |
Slave_IO_Running |
RECEIVED_TRANSACTION_SET |
Retrieved_Gtid_Set |
LAST_ERROR_NUMBER |
Last_IO_Errno |
LAST_ERROR_MESSAGE |
Last_IO_Error |
LAST_ERROR_TIMESTAMP |
Last_IO_Error_Timestamp |
Document created the 26/06/2006, last modified the 26/10/2018
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