3 Query	SHOW SLAVE STATUS
		    3 Query	SELECT COUNT(*) AS n FROM INFORMATION_SCHEMA.PROCESSLIST WHERE command='binlog dump'
		    3 Prepare	SELECT Select_priv, Process_priv, Super_priv, Repl_slave_priv, Repl_client_priv, Reload_priv FROM mysql.user WHERE user = ? AND host = ?
		    3 Execute	SELECT Select_priv, Process_priv, Super_priv, Repl_slave_priv, Repl_client_priv, Reload_priv FROM mysql.user WHERE user = 'root' AND host = '172.21.0.3'
		    3 Close stmt
		    3 Prepare	SELECT Select_priv, Process_priv, Super_priv, Repl_slave_priv, Repl_client_priv, Reload_priv FROM mysql.user WHERE user = ? AND host = ?
		    3 Execute	SELECT Select_priv, Process_priv, Super_priv, Repl_slave_priv, Repl_client_priv, Reload_priv FROM mysql.user WHERE user = 'root' AND host = '%'
		    3 Close stmt
		    3 Query	SELECT Variable_name AS variable_name, Variable_Value AS value FROM information_schema.global_variables
		    3 Query	SET default_master_connection=''
		    3 Query	SELECT Variable_name AS variable_name, Variable_Value AS value FROM information_schema.global_status
		    3 Query	SHOW SLAVE STATUS
		    4 Connect	root@172.21.0.1 as anonymous on
		    4 Query	SELECT @@max_allowed_packet
		    4 Query	SET default_master_connection=''
		    4 Query	RESET MASTER
		    4 Query	STOP ALL SLAVES
		    4 Query	SHOW ALL SLAVES STATUS
		    4 Query	SET GLOBAL gtid_slave_pos=''
160706 12:21:57	    4 Query	CHANGE MASTER '' TO master_host='172.21.0.2', master_port=3306, master_user='root', master_password='admin', master_use_gtid=current_pos, master_connect_retry=10
		    4 Query	START SLAVE ''
		    4 Query	SET GLOBAL read_only=1
		    5 Connect Out	root@172.21.0.2:3306
		    6 Query	FLUSH TABLES
160706 12:21:58	    3 Query	SELECT Variable_name AS variable_name, Variable_Value AS value FROM information_schema.global_variables
		    3 Query	SET default_master_connection=''
		    3 Query	SELECT Variable_name AS variable_name, Variable_Value AS value FROM information_schema.global_status
		    3 Query	SHOW SLAVE STATUS
		    3 Prepare	SELECT Select_priv, Process_priv, Super_priv, Repl_slave_priv, Repl_client_priv, Reload_priv FROM mysql.user WHERE user = ? AND host = ?
		    3 Execute	SELECT Select_priv, Process_priv, Super_priv, Repl_slave_priv, Repl_client_priv, Reload_priv FROM mysql.user WHERE user = 'root' AND host = '172.21.0.3'
		    3 Close stmt
		    3 Prepare	SELECT Select_priv, Process_priv, Super_priv, Repl_slave_priv, Repl_client_priv, Reload_priv FROM mysql.user WHERE user = ? AND host = ?
		    3 Execute	SELECT Select_priv, Process_priv, Super_priv, Repl_slave_priv, Repl_client_priv, Reload_priv FROM mysql.user WHERE user = 'root' AND host = '%'
		    3 Close stmt