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'#--------------------FN_DYNVARS_023_01-------------------------#'
SET @start_value= @@global.delay_key_write;
'#--------------------FN_DYNVARS_023_02-------------------------#'
CREATE PROCEDURE sp_addRecords (IN var1 INT,IN var2 INT)
BEGIN
WHILE (var1 < var2) DO
INSERT INTO t1 VALUES(var1,REPEAT('MYSQL',10),100000.0/var1);
SET var1=var1+1;
END WHILE;
END//
'---check when delay_key_write is OFF---'
SET @@global.delay_key_write = OFF;
CREATE TABLE t1(
a INT PRIMARY KEY,
b VARCHAR(512),
c DOUBLE
) DELAY_KEY_WRITE = 1;
FLUSH GLOBAL STATUS;
CALL sp_addRecords(1,10);
SHOW STATUS LIKE 'Key_reads';
Variable_name Value
Key_reads 0
SHOW STATUS LIKE 'Key_writes';
Variable_name Value
Key_writes 9
SHOW STATUS LIKE 'Key_write_requests';
Variable_name Value
Key_write_requests 9
SELECT COUNT(*) FROM t1;
COUNT(*)
9
DROP TABLE t1;
'----check when delay_key_write is ON---'
SET @@global.delay_key_write = ON;
CREATE TABLE t1(
a INT PRIMARY KEY,
b VARCHAR(512),
c DOUBLE
) DELAY_KEY_WRITE = 1;
FLUSH GLOBAL STATUS;
CALL sp_addRecords(1,10);
SHOW STATUS LIKE 'Key_reads';
Variable_name Value
Key_reads 0
SHOW STATUS LIKE 'Key_writes';
Variable_name Value
Key_writes 0
SHOW STATUS LIKE 'Key_write_requests';
Variable_name Value
Key_write_requests 9
SELECT COUNT(*) FROM t1;
COUNT(*)
9
DROP TABLE t1;
'----check when delay_key_write is ALL---'
SET @@global.delay_key_write = ALL;
CREATE TABLE t1(
a INT PRIMARY KEY,
b VARCHAR(512),
c DOUBLE
) DELAY_KEY_WRITE = 0;
FLUSH GLOBAL STATUS;
CALL sp_addRecords(1,10);
SHOW STATUS LIKE 'Key_reads';
Variable_name Value
Key_reads 0
SHOW STATUS LIKE 'Key_writes';
Variable_name Value
Key_writes 0
SHOW STATUS LIKE 'Key_write_requests';
Variable_name Value
Key_write_requests 9
SELECT COUNT(*) FROM t1;
COUNT(*)
9
DROP PROCEDURE sp_addRecords;
DROP TABLE t1;
SET @@global.delay_key_write= @start_value;
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