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CREATE SCHEMA my_schema;
USE my_schema;
CREATE FUNCTION f_thread_id (i INT) RETURNS CHAR(4) DETERMINISTIC
RETURN CONCAT(LPAD(CAST(i AS CHAR),3,'_'),'_') ;
SELECT CONCAT('->', f_thread_id( 1), '<-');
CONCAT('->', f_thread_id( 1), '<-')
->__1_<-
SELECT CONCAT('->', f_thread_id(12), '<-');
CONCAT('->', f_thread_id(12), '<-')
->_12_<-
SET @extra_int = 1;
SET @extra_string = f_thread_id(@extra_int);
SELECT @extra_int , @extra_string;
@extra_int @extra_string
1 __1_
CREATE FUNCTION f_col_int1 (i INT) RETURNS INT(20) DETERMINISTIC
RETURN i * 1000 + @extra_int ;
SELECT f_col_int1(my_col) AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
1001
12001
123001
1234001
12345001
CREATE FUNCTION f_col_int2 (i INT) RETURNS INT(20) DETERMINISTIC
RETURN @extra_int * 10000000 + i ;
SELECT f_col_int2(my_col) AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
10000001
10000012
10000123
10001234
10012345
CREATE FUNCTION f_col_int3 (i INT) RETURNS INT(20) DETERMINISTIC
RETURN @extra_int ;
SELECT f_col_int3(my_col) AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
1
1
1
1
1
CREATE FUNCTION f_col_blob (i INT) RETURNS BLOB DETERMINISTIC
RETURN RPAD(@extra_string,(@@innodb_page_size / 2 ) + 1,'a');
SELECT CONCAT('->', SUBSTR(f_col_blob(my_col) FROM 1 FOR 10),
'<-.....->', SUBSTR(f_col_blob(my_col) FROM -10 FOR 10), '<-') AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
->__1_aaaaaa<-.....->aaaaaaaaaa<-
->__1_aaaaaa<-.....->aaaaaaaaaa<-
->__1_aaaaaa<-.....->aaaaaaaaaa<-
->__1_aaaaaa<-.....->aaaaaaaaaa<-
->__1_aaaaaa<-.....->aaaaaaaaaa<-
CREATE FUNCTION f_col_char0 (i INT) RETURNS CHAR(255) DETERMINISTIC
RETURN LPAD(CAST(i AS CHAR),255,' ');
SELECT CONCAT('->', f_col_char0(my_col), '<-') AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
-> 1<-
-> 12<-
-> 123<-
-> 1234<-
-> 12345<-
CREATE FUNCTION f_col_char1 (i INT) RETURNS CHAR(26) DETERMINISTIC
RETURN
CONCAT('B',
LPAD(SUBSTR(CAST(i AS CHAR),1,(LENGTH(CAST(i AS CHAR)) DIV 2)),10,' '),
@extra_string,
RPAD(SUBSTR(CAST(i AS CHAR), -((LENGTH(CAST(i AS CHAR)) + 1) DIV 2)),10,' '),
'E') ;
SELECT CONCAT('->', f_col_char1(my_col), '<-') AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
->B __1_1 E<-
->B 1__1_2 E<-
->B 1__1_23 E<-
->B 12__1_34 E<-
->B 12__1_345 E<-
CREATE FUNCTION f_col_char2 (i INT) RETURNS CHAR(26) DETERMINISTIC
RETURN
CONCAT('B',
RPAD(SUBSTR(CAST(i AS CHAR),1,(LENGTH(CAST(i AS CHAR)) DIV 2)),10,' '),
@extra_string,
LPAD(SUBSTR(CAST(i AS CHAR), -((LENGTH(CAST(i AS CHAR)) + 1) DIV 2)),10,' '),
'E');
SELECT CONCAT('->', f_col_char2(my_col), '<-') AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
->B __1_ 1E<-
->B1 __1_ 2E<-
->B1 __1_ 23E<-
->B12 __1_ 34E<-
->B12 __1_ 345E<-
CREATE FUNCTION f_col_char3 (i INT) RETURNS CHAR(26) DETERMINISTIC
RETURN
CONCAT('B',@extra_string,LPAD(CAST(i AS CHAR),20,' '),'E');
SELECT CONCAT('->', f_col_char3(my_col), '<-') AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
->B__1_ 1E<-
->B__1_ 12E<-
->B__1_ 123E<-
->B__1_ 1234E<-
->B__1_ 12345E<-
CREATE FUNCTION f_col_char4 (i INT) RETURNS CHAR(26) DETERMINISTIC
RETURN
CONCAT('B',RPAD(CAST(i AS CHAR),20,' '),@extra_string,'E');
SELECT CONCAT('->', f_col_char4(my_col), '<-') AS my_result
FROM (SELECT 1 AS my_col UNION SELECT 12 UNION SELECT 123
UNION SELECT 1234 UNION SELECT 12345) AS tx;
my_result
->B1 __1_E<-
->B12 __1_E<-
->B123 __1_E<-
->B1234 __1_E<-
->B12345 __1_E<-
CREATE TABLE my_metrics LIKE information_schema.innodb_metrics;
ALTER TABLE my_metrics ADD COLUMN phase ENUM('after', 'before'),
DROP COLUMN SUBSYSTEM, DROP COLUMN TYPE, DROP COLUMN COMMENT,
ADD PRIMARY KEY (NAME,phase);
CREATE TABLE t1 (
col_int0 BIGINT,
col_int1 BIGINT,
col_int2 BIGINT,
col_int3 BIGINT,
col_blob BLOB,
col_char0 VARCHAR(255),
col_char1 VARCHAR(30),
col_char2 VARCHAR(30),
col_char3 VARCHAR(30),
col_char4 VARCHAR(30)
) ENGINE = InnoDB;
ALTER TABLE t1 ADD UNIQUE KEY uidx_col_int0 (col_int0),
ADD UNIQUE KEY uidx1 (col_int1, col_char0),
ADD UNIQUE KEY uidx2 (col_int2, col_char0, col_int1),
ADD UNIQUE KEY uidx3 (col_int3, col_int2, col_char0),
ADD UNIQUE KEY uidx4 (col_char1, col_char0),
ADD UNIQUE KEY uidx5 (col_char2, col_char0, col_char1),
ADD UNIQUE KEY uidx6 (col_char3, col_char2, col_char0),
ADD UNIQUE KEY uidx7 (col_int1, col_int2, col_int3, col_char4,
col_char1, col_char2, col_char3, col_char0),
ADD KEY idx8 (col_blob(10), col_char4);
CREATE PROCEDURE proc_fill_t1 (max_row_count INT, load_unit INT)
BEGIN
DECLARE my_count INTEGER DEFAULT 0;
DECLARE max_load_count INTEGER DEFAULT 0;
DROP TABLE IF EXISTS t0;
CREATE TEMPORARY TABLE t0 (col_int0 BIGINT, PRIMARY KEY(col_int0));
WHILE (my_count < load_unit ) DO
SET my_count = my_count + 1;
INSERT INTO t0 SET col_int0 = my_count;
END WHILE;
SET max_load_count = (SELECT (max_row_count DIV load_unit) + 1 );
SELECT COUNT(col_int0) INTO @val FROM t1;
SET my_count = 0;
REPEAT
INSERT INTO t1 (col_int0, col_int1, col_int2, col_int3, col_blob,
col_char0, col_char1, col_char2,col_char3,col_char4)
SELECT col_int0 + @val,
f_col_int1(col_int0 + @val),
f_col_int2(col_int0 + @val),
f_col_int3(col_int0 + @val),
f_col_blob(col_int0 + @val),
f_col_char0(col_int0 + @val),
f_col_char1(col_int0 + @val),
f_col_char2(col_int0 + @val),
f_col_char3(col_int0 + @val),
f_col_char4(col_int0 + @val)
FROM t0;
COMMIT;
SELECT MAX(col_int0) INTO @val FROM t1;
SET my_count = my_count + 1;
UNTIL( my_count > max_load_count OR @val >= max_row_count )
END REPEAT;
DROP TEMPORARY TABLE t0;
END|
CREATE PROCEDURE proc_dml (max_duration INT, t1_stripe_half INT)
BEGIN
DECLARE aux INTEGER DEFAULT 0;
DECLARE start_time INT;
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION, SQLWARNING, NOT FOUND BEGIN END;
SET @extra_int = CONNECTION_ID();
SET @extra_string = f_thread_id(@extra_int);
SELECT ROUND(MAX(col_int0) / 2 ) INTO @t1_half FROM t1;
# The user lock 'Blocker' should be already set by some other session S1.
# S1 starts the race by releasing that lock.
# Wait till the lock is released and the lock can be obtained.
# In order to prevent endless waiting in case of non foreseen problems
# limit the timespan to 30 seconds.
SELECT GET_LOCK('Blocker', 30) INTO @aux;
# Release the lock immediate so that the other "runner" sessions start too.
SELECT RELEASE_LOCK('Blocker') INTO @aux;
SET start_time = UNIX_TIMESTAMP();
WHILE (UNIX_TIMESTAMP() - start_time < max_duration) DO
SET @aux = @t1_half - t1_stripe_half + ROUND(RAND() * t1_stripe_half * 2);
UPDATE t1 SET
col_int1 = f_col_int1(col_int0),
col_int2 = f_col_int2(col_int0),
col_int3 = f_col_int3(col_int0),
col_blob = f_col_blob(col_int0),
col_char0 = f_col_char0(col_int0),
col_char1 = f_col_char1(col_int0),
col_char2 = f_col_char2(col_int0),
col_char3 = f_col_char3(col_int0),
col_char4 = f_col_char4(col_int0)
WHERE col_int0 = @aux;
COMMIT;
END WHILE;
END|
SET GLOBAL innodb_monitor_disable = "innodb_rwlock_sx_%";
SET @pre_reset_ts = NOW();
SET GLOBAL innodb_monitor_reset = "innodb_rwlock_sx_%";
SET @pre_enable_ts = NOW();
SET GLOBAL innodb_monitor_enable = "innodb_rwlock_sx_%";
SET @pre_collect_ts = NOW();
DELETE FROM my_metrics;
INSERT INTO my_metrics
SELECT NAME, COUNT, MAX_COUNT, MIN_COUNT, AVG_COUNT,
COUNT_RESET, MAX_COUNT_RESET, MIN_COUNT_RESET, AVG_COUNT_RESET,
TIME_ENABLED, TIME_DISABLED, TIME_ELAPSED, TIME_RESET,
STATUS, 'before'
FROM information_schema.innodb_metrics
WHERE NAME LIKE 'innodb_rwlock_sx_%';
# TC-01 There are exact three entries "innodb_rwlock_sx_%" with the
# with the name which follow in innodb_metrics.
# pass
SELECT COUNT(*) INTO @sx_count FROM my_metrics;
# TC-02 Counting is now enabled. ALL = @sx_count entries show that.
# pass
# TC-03 @pre_reset_ts < TIME_RESET. ALL = @sx_count entries show that.
# pass
# TC-04 @pre_enable_ts < TIME_ENABLED. ALL = @sx_count entries show that.
# pass
# TC-05 TIME_RESET < TIME_ENABLED AND TIME_ENABLED < @pre_collect_ts
# AND TIME_ELAPSED > 0. ALL = @sx_count entries show that.
# pass
# TC-06 COUNT_RESET = MAX_COUNT_RESET. ALL = @sx_count entries show that.
# pass
SET GLOBAL innodb_monitor_reset = "innodb_rwlock_sx_%";
SHOW ENGINE INNODB STATUS;
DELETE FROM my_metrics;
INSERT INTO my_metrics
SELECT NAME, COUNT, MAX_COUNT, MIN_COUNT, AVG_COUNT,
COUNT_RESET, MAX_COUNT_RESET, MIN_COUNT_RESET, AVG_COUNT_RESET,
TIME_ENABLED, TIME_DISABLED, TIME_ELAPSED, TIME_RESET,
STATUS, 'before'
FROM information_schema.innodb_metrics
WHERE NAME LIKE 'innodb_rwlock_sx_%';
SET @extra_string = '__0_';
SET @extra_int = 0;
# TC-07 One session inserts some significant amount of rows into t1.
# The system MUST survive that.
SET @max_row_count = <max_row_count>;
SET @load_unit = <load_unit>;
SET @start_time = UNIX_TIMESTAMP();
SET AUTOCOMMIT = OFF;
CALL proc_fill_t1 (@max_row_count, @load_unit);
# pass
SET AUTOCOMMIT = ON;
SELECT col_int0 INTO @t1_half FROM t1
WHERE col_int0 >= (@val DIV 2) ORDER BY col_int0 LIMIT 1;
SHOW ENGINE INNODB STATUS;
SELECT col_int0, col_int1, col_int2, col_int3,
CONCAT('->', SUBSTR(col_blob FROM 1 FOR 10),
'<-.....->', SUBSTR(col_blob FROM -10 FOR 10), '<-') AS col_blobx,
CONCAT('->',col_char0,'<-') AS col_char0x,
CONCAT('->',col_char1,'<-') AS col_char1x,
CONCAT('->',col_char2,'<-') AS col_char2x,
CONCAT('->',col_char3,'<-') AS col_char3x,
CONCAT('->',col_char4,'<-') AS col_char4x
FROM t1 WHERE col_int0 between 98 AND 102;
col_int0 98
col_int1 98000
col_int2 98
col_int3 0
col_blobx ->__0_aaaaaa<-.....->aaaaaaaaaa<-
col_char0x -> 98<-
col_char1x ->B 9__0_8 E<-
col_char2x ->B9 __0_ 8E<-
col_char3x ->B__0_ 98E<-
col_char4x ->B98 __0_E<-
col_int0 99
col_int1 99000
col_int2 99
col_int3 0
col_blobx ->__0_aaaaaa<-.....->aaaaaaaaaa<-
col_char0x -> 99<-
col_char1x ->B 9__0_9 E<-
col_char2x ->B9 __0_ 9E<-
col_char3x ->B__0_ 99E<-
col_char4x ->B99 __0_E<-
col_int0 100
col_int1 100000
col_int2 100
col_int3 0
col_blobx ->__0_aaaaaa<-.....->aaaaaaaaaa<-
col_char0x -> 100<-
col_char1x ->B 1__0_00 E<-
col_char2x ->B1 __0_ 00E<-
col_char3x ->B__0_ 100E<-
col_char4x ->B100 __0_E<-
col_int0 101
col_int1 101000
col_int2 101
col_int3 0
col_blobx ->__0_aaaaaa<-.....->aaaaaaaaaa<-
col_char0x -> 101<-
col_char1x ->B 1__0_01 E<-
col_char2x ->B1 __0_ 01E<-
col_char3x ->B__0_ 101E<-
col_char4x ->B101 __0_E<-
col_int0 102
col_int1 102000
col_int2 102
col_int3 0
col_blobx ->__0_aaaaaa<-.....->aaaaaaaaaa<-
col_char0x -> 102<-
col_char1x ->B 1__0_02 E<-
col_char2x ->B1 __0_ 02E<-
col_char3x ->B__0_ 102E<-
col_char4x ->B102 __0_E<-
# TC-11 Several concurrent sessions perform updates in t1 like mad.
# The system MUST survive this.
# Printing of statements is partially suppressed.
SET @start_time = UNIX_TIMESTAMP();
SELECT 1 FROM t1 WHERE col_int0 = @t1_half FOR UPDATE;
1
1
SELECT GET_LOCK('Blocker', 1000) ;
GET_LOCK('Blocker', 1000)
1
RELEASE_LOCK('Blocker')
1
# pass
SHOW ENGINE INNODB STATUS;
# TC-13 One session performs ALTER TABLE t1 ADD KEY ... on the fat table t1.
# The system MUST survive this.
SET @start_time = UNIX_TIMESTAMP();
ALTER TABLE t1 ADD KEY idx_col_char4_col_char0 (col_char4,col_char0);
SHOW ENGINE INNODB STATUS;
# pass
# TC-15 One session performs a fat update on the fat table t1.
# The system MUST survive this.
SET @start_time = UNIX_TIMESTAMP();
SET @extra_int = 13;
SET @extra_string = f_thread_id(@extra_int);
UPDATE t1 SET
col_int1 = f_col_int1(col_int0), col_int2 = f_col_int2(col_int0),
col_int3 = f_col_int3(col_int0), col_blob = f_col_blob(col_int0),
col_char0 = f_col_char0(col_int0), col_char1 = f_col_char1(col_int0),
col_char2 = f_col_char2(col_int0), col_char3 = f_col_char3(col_int0),
col_char4 = f_col_char4(col_int0)
WHERE col_int0 BETWEEN @t1_half - 2500 AND @t1_half + 2500;
COMMIT;
SHOW ENGINE INNODB STATUS;
# pass
INSERT INTO my_metrics
SELECT NAME, COUNT, MAX_COUNT, MIN_COUNT, AVG_COUNT,
COUNT_RESET, MAX_COUNT_RESET, MIN_COUNT_RESET, AVG_COUNT_RESET,
TIME_ENABLED, TIME_DISABLED, TIME_ELAPSED, TIME_RESET,
STATUS, 'after'
FROM information_schema.innodb_metrics
WHERE NAME LIKE 'innodb_rwlock_sx_%';
# TC-16 The following activities happend after reset in innodb_metrics
# - Insert some significant amount of rows into t1.
# - Several concurrent users perform excessive updates in t1.
# - ALTER TABLE ... ADD KEY <sufficient big enough structure>
# - One UPDATE statement modifying a huge slice of t1.
# Any of them causes heavy use of SX lock and therefore COUNT_RESET
# must have grown for ALL = @sx_count entries.
# pass
# TC-09 Heavy activity after reset.
# COUNT_RESET = MAX_COUNT_RESET for ALL = @sx_count entries
# needs to stay valid though he counters will have grown.
# pass
DELETE FROM my_metrics;
INSERT INTO my_metrics
SELECT NAME, COUNT, MAX_COUNT, MIN_COUNT, AVG_COUNT,
COUNT_RESET, MAX_COUNT_RESET, MIN_COUNT_RESET, AVG_COUNT_RESET,
TIME_ENABLED, TIME_DISABLED, TIME_ELAPSED, TIME_RESET,
STATUS, 'before'
FROM information_schema.innodb_metrics
WHERE NAME LIKE 'innodb_rwlock_sx_%';
SET GLOBAL innodb_monitor_reset = "innodb_rwlock_sx_%";
INSERT INTO my_metrics
SELECT NAME, COUNT, MAX_COUNT, MIN_COUNT, AVG_COUNT,
COUNT_RESET, MAX_COUNT_RESET, MIN_COUNT_RESET, AVG_COUNT_RESET,
TIME_ENABLED, TIME_DISABLED, TIME_ELAPSED, TIME_RESET,
STATUS, 'after'
FROM information_schema.innodb_metrics
WHERE NAME LIKE 'innodb_rwlock_sx_%';
# TC-08 There was a reset. COUNT_RESET = MAX_COUNT_RESET for ALL
# = @sx_count entries.
# pass
# TC-17 We had heavy activity causing big counters and after that a reset.
# Reset causes COUNT > COUNT_RESET AND MAX_COUNT > MAX_COUNT_RESET
# for ALL @sx_count entries.
# pass
# TC-18 We had some reset but this must not decrease COUNT or MAX_COUNT
# after.COUNT >= before.COUNT AND
# after.MAX_COUNT >= before.MAX_COUNT for ALL @sx_count entries.
# pass
# TC-19 We had some reset after heavy activity and this must cause
# after.COUNT_RESET < before.COUNT_RESET
# AND after.MAX_COUNT_RESET < before.MAX_COUNT_RESET AND
# for ALL @sx_count entries.
# pass
USE test;
DROP SCHEMA my_schema;
SET GLOBAL innodb_monitor_disable = all;
SET GLOBAL innodb_monitor_reset_all = all;
SET GLOBAL innodb_monitor_enable = default;
SET GLOBAL innodb_monitor_disable = default;
SET GLOBAL innodb_monitor_reset = default;
SET GLOBAL innodb_monitor_reset_all = default;
SET GLOBAL innodb_monitor_disable = "innodb_rwlock_sx_%";
SET GLOBAL innodb_monitor_reset = "innodb_rwlock_sx_%";