WordPress

SET @global_slow_query_log = @@global.slow_query_log;
SET @global_log_output = @@global.log_output;
SET @@session.long_query_time=1;
SET @@global.log_output = 'TABLE';
'----When slow_query_log = OFF----'
SET @@global.slow_query_log = OFF;
TRUNCATE mysql.slow_log;
SELECT sleep(2);
sleep(2)
0
SELECT count(*) FROM mysql.slow_log;
count(*)
0
'----When slow_query_log = ON-----'
SET @@global.slow_query_log = ON;
TRUNCATE mysql.slow_log;
SELECT sleep(2);
sleep(2)
0
SELECT count(*) > 0 FROM mysql.slow_log;
count(*) > 0
1
'Bug#47905 stored procedures not logged correctly to slow query log'
TRUNCATE mysql.slow_log;
CREATE PROCEDURE p_test() 
BEGIN
select sleep(2);
select 1;
END//
CALL p_test();
sleep(2)
0
1
1
SELECT count(*) > 0 FROM mysql.slow_log;
count(*) > 0
1
DROP PROCEDURE p_test;
Bug53191 Lock_time in slow log is negative when logging stored routines
TRUNCATE mysql.slow_log;
CREATE TABLE t1 (c0 INT PRIMARY KEY AUTO_INCREMENT, c1 TIMESTAMP, c2 TIMESTAMP);
CREATE FUNCTION f_slow_now() RETURNS TIMESTAMP
BEGIN
DO SLEEP(2);
RETURN NOW();
END//
CREATE FUNCTION f_slow_current_time() RETURNS TIME
BEGIN
DO SLEEP(2);
RETURN CURRENT_TIME();
END
//
INSERT INTO t1 (c1,c2) VALUES (now(), f_slow_now())//
CREATE TRIGGER tf_before BEFORE INSERT ON t1
FOR EACH ROW BEGIN
SET new.c2 = f_slow_now();
END//
CREATE PROCEDURE p1()
BEGIN
INSERT INTO t1 (c1,c2) values (now(),now());
DO SLEEP(2);
INSERT INTO t1 (c1,c2) values (now(),now());
end//
INSERT INTO t1 (c1,c2) VALUES (now(), now());
CALL p1();
SELECT c1-c2 FROM t1;
c1-c2
0
0
0
0
*** There shouldn't less than 1 s difference between each row
SELECT t1.c1-self.c1 > 1 FROM t1, t1 as self WHERE t1.c0=self.c0+1 ORDER BY t1.c0;
t1.c1-self.c1 > 1
1
1
1
DROP TRIGGER tf_before;
DROP FUNCTION f_slow_now;
DROP FUNCTION f_slow_current_time;
DROP TABLE t1;
DROP TABLE IF EXISTS t1;
Warnings:
Note	1051	Unknown table 't1'
CREATE TABLE t1(c1 INT) ENGINE=MyISAM;
DROP PROCEDURE IF EXISTS p1;
CREATE PROCEDURE p1()
BEGIN
INSERT INTO t1 VALUES (1);
SELECT COUNT(*) FROM t1 WHERE c1= 1;
UPDATE t1 SET c1=c1*2;
END|
Connection 2
LOCK TABLE t1 WRITE;
Back to default connection
CALL p1();
Wait three seconds and unlock the table
UNLOCK TABLES;
COUNT(*)
1
Slow log:
**** 1 == we have slow log entries
SELECT count(*) > 0 FROM mysql.slow_log;
count(*) > 0
1
**** 0 == None of the entries have a lock time greater than 10 s
SELECT count(*) FROM mysql.slow_log WHERE lock_time > 10;
count(*)
0
DROP TABLE t1;
DROP PROCEDURE p1;
SET @@global.log_output = @global_log_output;
SET @global.slow_query_log = @global_slow_query_log;