Replication and Binary Logging Options and Variables SET_VAR  Hint Applies No Type Boolean Default Value OFF Command-Line Format --rpl-semi-sync-master-timeout=# System Variable rpl_semi_sync_master_timeout Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Integer Default Value 10000 Command-Line Format --rpl-semi-sync-master-trace-level=# System Variable rpl_semi_sync_master_trace_level Scope Global Dynamic Yes SET_VAR  Hint Applies No Type Integer Default Value 32 3502 The semisynchronous replication debug trace level on the source server. Four levels are defined: This variable is available only if the source-side semisynchronous replication plugin is installed. This variable is available only if the source-side semisynchronous replication plugin is installed. A value in milliseconds that controls how long the source waits on a commit for acknowledgment from a replica before timing out and reverting to asynchronous replication. The default value is 10000 (10 seconds). Controls whether semisynchronous replication is enabled on the source server. To enable or disable the plugin, set this variable to  ON  or  OFF  (or 1 or 0), respectively. The default is  OFF . This variable is available only if the source-side semisynchronous replication plugin is installed. • rpl_semi_sync_master_timeout • rpl_semi_sync_master_trace_level •1 = general level (for example, time function failures) •16 = detail level (more verbose information) •32 = net wait level (more information about network waits) •64 = function level (information about function entry and exit)