wsrep_flow_control_sent

Overview

Number of pause events sent for Flow Control.

See also: Status Variables in 10.6 ES, in 10.6 CS, in 10.5 ES, in 10.5 CS, in 10.4 ES, in 10.4 CS, in 10.3 ES, in 10.3 CS, in 10.2 ES, and in 10.2 CS

DETAILS

Flow Control throttles replication to allow slow nodes to catch up with the cluster. This is done to prevent the nodes from falling too far behind the cluster in applying transactions.

This status variable provides the number of Flow Control pause (FC_PAUSE) events since startup that the node has sent to the cluster.

Note

The FLUSH STATUS statement does not reset the counter for this status variable.

EXAMPLES

Use the SHOW STATUS statement to view the current number of pause events triggered by Flow Control:

SHOW STATUS LIKE "wsrep_flow_control_sent";
+-------------------------+-------+
| Variable_name           | Value |
+-------------------------+-------+
| wsrep_flow_control_sent |    2  |
+-------------------------+-------+

CHANGE HISTORY

Release Series

History

10.6 Enterprise

  • Present starting in MariaDB Enterprise Server 10.6.4-1.

10.6 Community

  • Present starting in MariaDB Community Server 10.6.0.

10.5 Enterprise

  • Present starting in MariaDB Enterprise Server 10.5.3-1.

10.5 Community

  • Present starting in MariaDB Community Server 10.5.0.

10.4 Enterprise

  • Present starting in MariaDB Enterprise Server 10.4.6-1.

10.4 Community

  • Present starting in MariaDB Community Server 10.4.0.

10.3 Enterprise

  • Present starting in MariaDB Enterprise Server 10.3.16-1.

10.3 Community

  • Present starting in MariaDB Community Server 10.3.0.

10.2 Enterprise

  • Present starting in MariaDB Enterprise Server 10.2.25-1.

10.2 Community

  • Present starting in MariaDB Community Server 10.2.0.

EXTERNAL REFERENCES