include/master-slave.inc
[connection master]
connection server_2;
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
SET GLOBAL slave_parallel_threads=10;
ERROR HY000: This operation cannot be performed as you have a running slave ''; run STOP SLAVE '' first
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=10;
SELECT IF(COUNT(*) < 10, "OK", CONCAT("Found too many system user processes: ", COUNT(*))) FROM information_schema.processlist WHERE user = "system user";
IF(COUNT(*) < 10, "OK", CONCAT("Found too many system user processes: ", COUNT(*)))
OK
CHANGE MASTER TO master_use_gtid=slave_pos;
include/start_slave.inc
SELECT IF(COUNT(*) >= 10, "OK", CONCAT("Found too few system user processes: ", COUNT(*))) FROM information_schema.processlist WHERE user = "system user";
IF(COUNT(*) >= 10, "OK", CONCAT("Found too few system user processes: ", COUNT(*)))
OK
include/stop_slave.inc
SELECT IF(COUNT(*) < 10, "OK", CONCAT("Found too many system user processes: ", COUNT(*))) FROM information_schema.processlist WHERE user = "system user";
IF(COUNT(*) < 10, "OK", CONCAT("Found too many system user processes: ", COUNT(*)))
OK
include/start_slave.inc
SELECT IF(COUNT(*) >= 10, "OK", CONCAT("Found too few system user processes: ", COUNT(*))) FROM information_schema.processlist WHERE user = "system user";
IF(COUNT(*) >= 10, "OK", CONCAT("Found too few system user processes: ", COUNT(*)))
OK
*** Test long-running query in domain 1 can run in parallel with short queries in domain 0 ***
connection server_1;
ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
CREATE TABLE t1 (a int PRIMARY KEY) ENGINE=MyISAM;
CREATE TABLE t2 (a int PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (1);
connection server_2;
connect  con_temp1,127.0.0.1,root,,test,$SERVER_MYPORT_2,;
LOCK TABLE t1 WRITE;
connection server_1;
SET gtid_domain_id=1;
INSERT INTO t1 VALUES (2);
SET gtid_domain_id=0;
INSERT INTO t2 VALUES (2);
INSERT INTO t2 VALUES (3);
BEGIN;
INSERT INTO t2 VALUES (4);
INSERT INTO t2 VALUES (5);
COMMIT;
INSERT INTO t2 VALUES (6);
connection server_2;
SELECT * FROM t2 ORDER by a;
a
1
2
3
4
5
6
connection con_temp1;
SELECT * FROM t1;
a
1
UNLOCK TABLES;
connection server_2;
SELECT * FROM t1 ORDER BY a;
a
1
2
connection server_2;
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
include/start_slave.inc
connection server_1;
DROP TABLE t1,t2;
include/rpl_end.inc