Using System Variables Variable Name Variable Type Variable Scope rbr_exec_mode Enumeration Both read_buffer_size Integer Both read_only Boolean Global read_rnd_buffer_size Integer Both regexp_stack_limit Integer Global regexp_time_limit Integer Global relay_log_info_repository String Global relay_log_purge Boolean Global replication_optimize_for_static_plugin_config Boolean Global replication_sender_observe_commit_only Boolean Global require_row_format Boolean Session require_secure_transport Boolean Global resultset_metadata Enumeration Session rewriter_enabled Boolean Global rewriter_verbose Integer Global rpl_read_size Integer Global rpl_semi_sync_master_enabled Boolean Global rpl_semi_sync_master_timeout Integer Global rpl_semi_sync_master_trace_level Integer Global rpl_semi_sync_master_wait_for_slave_count Integer Global rpl_semi_sync_master_wait_no_slave Boolean Global rpl_semi_sync_master_wait_point Enumeration Global rpl_semi_sync_slave_enabled Boolean Global rpl_semi_sync_slave_trace_level Integer Global rpl_stop_slave_timeout Integer Global schema_definition_cache Integer Global secondary_engine_cost_threshold Numeric Session select_into_buffer_size Integer Both select_into_disk_sync Boolean Both select_into_disk_sync_delay Integer Both server_id Integer Global session_track_gtids Enumeration Both session_track_schema Boolean Both session_track_state_change Boolean Both session_track_system_variables String Both session_track_transaction_info Enumeration Both sha256_password_proxy_users Boolean Global show_create_table_skip_secondary_engine Boolean Session 935