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CREATE TABLE t1 (id INT PRIMARY KEY AUTO_INCREMENT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1);
SET GLOBAL wsrep_provider_options = "repl.causal_read_timeout=PT1S";
SET GLOBAL debug_dbug = "d,sync.wsrep_apply_cb";
SELECT MAX(id) FROM t1;
MAX(id)
1
INSERT INTO t1 VALUES (2);
SELECT MAX(id) FROM t1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SET GLOBAL debug_dbug = "";
SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb";
FLUSH QUERY CACHE;
SET GLOBAL debug_dbug = "d,sync.wsrep_apply_cb";
SET DEBUG_SYNC = "RESET";
INSERT INTO t1 VALUES (3);
SELECT MAX(id) FROM t1;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
SET GLOBAL debug_dbug = "";
SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb";
INSERT INTO t1 VALUES (4);
SELECT MAX(id) FROM t1;
MAX(id)
4
FLUSH STATUS;
SELECT MAX(id) FROM t1;
MAX(id)
4
SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'Qcache_hits';
VARIABLE_VALUE = 1
1
SET GLOBAL debug_dbug = "d,sync.wsrep_apply_cb";
INSERT INTO t1 VALUES (5);
SELECT MAX(id) FROM t1 ;
SET GLOBAL debug_dbug = "";
SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb";
MAX(id)
5
SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.SESSION_STATUS WHERE VARIABLE_NAME = 'Qcache_hits';
VARIABLE_VALUE = 1
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