phpmysqlmaster-slave

Waiting until slave has been synchronized

Is there any SQL (or PHP command) that can be used to either force a master to propagate changes to slaves and/or wait until the changes have been propagated to all slaves?

Solution

  • You can use the function SOURCE_POS_WAIT(). Call this function in an SQL expression on the replica, and it will block (not return) until the replica has executed up to specified log file & position.

    SELECT SOURCE_POS_WAIT('mysql-bin.000042', 8675309);

    See https://dev.mysql.com/doc/refman/8.0/en/replication-functions-synchronization.html#function_source-pos-wait

    Before MySQL 8.0.26, use MASTER_POS_WAIT() which was the old name for this function.