When do I add gtids to MySQL GTID executed variable?
When the server starts, @@global.gtid_executed is initialized to the union of the following two sets: The GTIDs found in every Gtid_log_event in the newest binary log. Thereafter, GTIDs are added to the set as transactions are executed. gtid_purged can only be set when it is blank.
How does enforce GTID consistency work in MySQL?
enforce_gtid_consistency Depending on the value of this variable, the server enforces GTID consistency by allowing execution of only statements that can be safely logged using a GTID. You must set this variable to ON before enabling GTID based replication. The values that enforce_gtid_consistency can be configured to are:
Why are GTID variables blanked out in dB?
GTID variables can be seen by running: When you run RESET MASTER on the DB Server, these values are blanked out. Issuing RESET MASTER causes the global value (but not the session value) of this variable to be reset to an empty string. GTIDs are not otherwise removed from this set other than when the set is cleared due to RESET MASTER.
Why are gtids not saved in binary log file?
In the event of the server stopping unexpectedly, the set of GTIDs from the current binary log file is not saved in the mysql.gtid_executed table. These GTIDs are added to the table from the binary log file during recovery so that replication can continue.
How are GTID executed and GTID purged computed?
When binlog_gtid_simple_recovery=TRUE , which is the default, the values of gtid_executed and gtid_purged are computed at startup based on the values of Previous_gtids_log_event in the most recent and oldest binary log files. For a description of the computation, see The gtid_purged System Variable.
What does binlog _ GTID _ simple _ recovery mean in MySQL?
This variable controls how binary log files are iterated during the search for GTIDs when MySQL starts or restarts. When binlog_gtid_simple_recovery=TRUE , which is the default, the values of gtid_executed and gtid_purged are computed at startup based on the values of Previous_gtids_log_event in the most recent and oldest binary log files.