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What do I need to know about replication in MySQL?
Slave_IO_Running: Whether the I/O thread for reading the source’s binary log is running. Normally, you want this to be Yes unless you have not yet started replication or have explicitly stopped it with STOP SLAVE . Slave_SQL_Running: Whether the SQL thread for executing events in the relay log is running.
What is the Reference Manual for MySQL 5.6?
MySQL 5.6 Reference Manual / / The most common task when managing a replication process is to ensure that replication is taking place and that there have been no errors between the slave and the source. The primary statement for this is SHOW SLAVE STATUS, which you must execute on each slave:
How to check the slave status in MySQL?
The primary statement for this is SHOW SLAVE STATUS, which you must execute on each slave: The key fields from the status report to examine are: Slave_IO_State: The current status of the slave. See Section 8.14.7, “Replication Replica I/O Thread States”, and Section 8.14.8, “Replication Replica SQL Thread States”, for more information.
What’s the most common task when managing a replication process?
The most common task when managing a replication process is to ensure that replication is taking place and that there have been no errors between the slave and the source. The primary statement for this is SHOW SLAVE STATUS, which you must execute on each slave: The key fields from the status report to examine are:
How are MySQL replicas updated asynchronously in azure database?
Replicas are updated asynchronously by using the MySQL engine’s native binary log (binlog) file position-based replication technology. For more information, see MySQL binlog file position-based replication configuration overview. The replication lag on the secondary read replicas depends several factors.
What causes high replication latency in MySQL server?
Investigate any nonzero error value by checking the error code in the MySQL server error message reference. The following sections address scenarios in which high replication latency is common. If you see the following values, then replication latency is likely caused by high network latency or high CPU consumption on the source server.
What happens if start replica | slave succeeds in starting?
If START REPLICA | SLAVE succeeds in starting the replication threads, it returns without any error. However, even in that case, it might be that the replication threads start and then later stop (for example, because they do not manage to connect to the source or read its binary log, or some other problem).