CREATE TABLE t1 (f1 INTEGER) Engine=InnoDB;SET GLOBAL wsrep_slave_threads = 10;SET GLOBAL wsrep_slave_threads = 1;INSERT INTO t1 VALUES (1);SET GLOBAL wsrep_slave_threads = 10;SET GLOBAL wsrep_slave_threads = 20;SET GLOBAL wsrep_slave_threads = 1;INSERT INTO t1 VALUES (1);INSERT INTO t1 VALUES (2);INSERT INTO t1 VALUES (3);INSERT INTO t1 VALUES (4);INSERT INTO t1 VALUES (5);INSERT INTO t1 VALUES (6);INSERT INTO t1 VALUES (7);INSERT INTO t1 VALUES (8);INSERT INTO t1 VALUES (9);SET GLOBAL wsrep_slave_threads = 10;SET GLOBAL wsrep_slave_threads = 0;Warnings:Warning 1292 Truncated incorrect wsrep_slave_threads value: '0'INSERT INTO t1 VALUES (10);INSERT INTO t1 VALUES (11);INSERT INTO t1 VALUES (12);INSERT INTO t1 VALUES (13);INSERT INTO t1 VALUES (14);INSERT INTO t1 VALUES (15);INSERT INTO t1 VALUES (16);INSERT INTO t1 VALUES (17);INSERT INTO t1 VALUES (18);INSERT INTO t1 VALUES (19);INSERT INTO t1 VALUES (20);SET GLOBAL wsrep_slave_threads = 1;DROP TABLE t1;