mirror of
https://github.com/MariaDB/server.git
synced 2025-02-07 06:12:18 +01:00
e581396b7a
Before commit6112853cdain MySQL 4.1.1 introduced the parameter innodb_file_per_table, all InnoDB data was written to the InnoDB system tablespace (often named ibdata1). A serious design problem is that once the system tablespace has grown to some size, it cannot shrink even if the data inside it has been deleted. There are also other design problems, such as the server hang MDEV-29930 that should only be possible when using innodb_file_per_table=0 and innodb_undo_tablespaces=0 (storing both tables and undo logs in the InnoDB system tablespace). The parameter innodb_change_buffering was deprecated in commitb5852ffbee. Starting with commitbaf276e6d4(MDEV-19229) the number of innodb_undo_tablespaces can be increased, so that the undo logs can be moved out of the system tablespace of an existing installation. If all these things (tables, undo logs, and the change buffer) are removed from the InnoDB system tablespace, the only variable-size data structure inside it is the InnoDB data dictionary. DDL operations on .ibd files was optimized in commit86dc7b4d4c(MDEV-24626). That should have removed any thinkable performance advantage of using innodb_file_per_table=0. Since there should be no benefit of setting innodb_file_per_table=0, the parameter should be deprecated. Starting with MySQL 5.6 and MariaDB Server 10.0, the default value is innodb_file_per_table=1.
177 lines
4 KiB
SQL
177 lines
4 KiB
SQL
#
|
|
# wl#7277: InnoDB: Bulk Load for Create Index
|
|
#
|
|
|
|
# Create Insert Procedure
|
|
DELIMITER |;
|
|
CREATE PROCEDURE populate_t1(load_even INT)
|
|
BEGIN
|
|
DECLARE i int DEFAULT 1;
|
|
|
|
START TRANSACTION;
|
|
WHILE (i <= 10000) DO
|
|
IF i%2 = 0 AND load_even = 1 THEN
|
|
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
|
|
END IF;
|
|
IF i%2 != 0 AND load_even != 1 THEN
|
|
INSERT INTO t1 VALUES (i, i, CONCAT('a', i));
|
|
END IF;
|
|
SET i = i + 1;
|
|
END WHILE;
|
|
COMMIT;
|
|
END|
|
|
DELIMITER ;|
|
|
|
|
SELECT @@innodb_fill_factor;
|
|
|
|
if ($row_format != 'COMPRESSED')
|
|
{
|
|
eval CREATE TABLE t1(
|
|
class INT,
|
|
id INT,
|
|
title VARCHAR(100)
|
|
) ENGINE=InnoDB ROW_FORMAT=$row_format;
|
|
}
|
|
|
|
if ($row_format == 'COMPRESSED')
|
|
{
|
|
eval CREATE TABLE t1(
|
|
class INT,
|
|
id INT,
|
|
title VARCHAR(100)
|
|
) ENGINE=InnoDB ROW_FORMAT=$row_format KEY_BLOCK_SIZE=4;
|
|
}
|
|
|
|
-- disable_query_log
|
|
# Load half records
|
|
CALL populate_t1(1);
|
|
-- enable_query_log
|
|
|
|
SELECT COUNT(*) FROM t1;
|
|
|
|
/* Create index. */
|
|
CREATE INDEX idx_id ON t1(id);
|
|
|
|
CREATE INDEX idx_title ON t1(title);
|
|
|
|
/* Check table. */
|
|
CHECK TABLE t1;
|
|
|
|
/* Select by index. */
|
|
EXPLAIN SELECT * FROM t1 WHERE id = 10;
|
|
EXPLAIN SELECT * FROM t1 WHERE title = 'a10';
|
|
|
|
SELECT * FROM t1 WHERE id = 10;
|
|
SELECT * FROM t1 WHERE title = 'a10';
|
|
|
|
SELECT * FROM t1 WHERE id = 5000;
|
|
SELECT * FROM t1 WHERE title = 'a5000';
|
|
|
|
SELECT * FROM t1 WHERE id = 10000;
|
|
SELECT * FROM t1 WHERE title = 'a10000';
|
|
|
|
SELECT * FROM t1 WHERE id = 10010;
|
|
SELECT * FROM t1 WHERE title = 'a10010';
|
|
|
|
/*Insert/Update/Delete. */
|
|
DELETE FROM t1 WHERE id < 4010 AND id > 3990;
|
|
INSERT INTO t1 VALUES(4000, 4000, 'b4000');
|
|
UPDATE t1 SET title = CONCAT('b', id) WHERE id < 3010 AND id > 2990;
|
|
|
|
SELECT * FROM t1 WHERE id = 3000;
|
|
SELECT * FROM t1 WHERE title = 'a3000';
|
|
SELECT * FROM t1 WHERE title = 'b3000';
|
|
|
|
SELECT * FROM t1 WHERE id = 4000;
|
|
SELECT * FROM t1 WHERE title = 'a4000';
|
|
SELECT * FROM t1 WHERE title = 'b4000';
|
|
|
|
SELECT * FROM t1 WHERE id = 4001;
|
|
SELECT * FROM t1 WHERE title = 'a4001';
|
|
|
|
-- disable_query_log
|
|
# Load half records (follow up load)
|
|
CALL populate_t1(0);
|
|
-- enable_query_log
|
|
SELECT COUNT(*) FROM t1;
|
|
|
|
|
|
/* Add column. */
|
|
ALTER TABLE t1 ADD COLUMN content TEXT;
|
|
|
|
CHECK TABLE t1;
|
|
|
|
SELECT * FROM t1 WHERE id = 10;
|
|
SELECT * FROM t1 WHERE title = 'a10';
|
|
|
|
SELECT * FROM t1 WHERE id = 5000;
|
|
SELECT * FROM t1 WHERE title = 'a5000';
|
|
|
|
SELECT * FROM t1 WHERE id = 10000;
|
|
SELECT * FROM t1 WHERE title = 'a10000';
|
|
|
|
SELECT * FROM t1 WHERE id = 10010;
|
|
SELECT * FROM t1 WHERE title = 'a10010';
|
|
|
|
/* Drop column. */
|
|
ALTER TABLE t1 DROP COLUMN content;
|
|
|
|
CHECK TABLE t1;
|
|
|
|
SELECT * FROM t1 WHERE id = 10;
|
|
SELECT * FROM t1 WHERE title = 'a10';
|
|
|
|
SELECT * FROM t1 WHERE id = 5000;
|
|
SELECT * FROM t1 WHERE title = 'a5000';
|
|
|
|
SELECT * FROM t1 WHERE id = 10000;
|
|
SELECT * FROM t1 WHERE title = 'a10000';
|
|
|
|
SELECT * FROM t1 WHERE id = 10010;
|
|
SELECT * FROM t1 WHERE title = 'a10010';
|
|
|
|
DROP TABLE t1;
|
|
|
|
# Test Blob
|
|
if ($row_format != 'COMPRESSED') {
|
|
eval CREATE TABLE t1(
|
|
a INT PRIMARY KEY,
|
|
b TEXT,
|
|
c TEXT) ENGINE=InnoDB ROW_FORMAT=$row_format;
|
|
}
|
|
|
|
if ($row_format == 'COMPRESSED') {
|
|
eval CREATE TABLE t1(
|
|
a INT PRIMARY KEY,
|
|
b BLOB,
|
|
c TEXT) ENGINE=InnoDB ROW_FORMAT=$row_format KEY_BLOCK_SIZE=4;
|
|
}
|
|
|
|
let $cnt= 5000;
|
|
-- disable_query_log
|
|
WHILE ($cnt>=4950)
|
|
{
|
|
EVAL INSERT INTO t1 VALUES
|
|
($cnt, REPEAT(CONCAT('a', $cnt),2000), CONCAT('a', $cnt));
|
|
dec $cnt;
|
|
}
|
|
-- enable_query_log
|
|
ALTER TABLE t1 ADD INDEX `idx` (a,b(5));
|
|
|
|
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
|
|
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
|
|
UPDATE t1 SET b = REPEAT(CONCAT('b',4975),2000) WHERE a=4975 AND b like 'a4975%';
|
|
SELECT b=REPEAT(CONCAT('a',4975),2000) FROM t1 WHERE a=4975 AND b like 'a4975%';
|
|
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
|
|
DELETE FROM t1 WHERE a=4975 AND b like 'b4975%';
|
|
SELECT b=REPEAT(CONCAT('b',4975),2000) FROM t1 WHERE a=4975 AND b like 'b4975%';
|
|
|
|
ALTER TABLE t1 DROP COLUMN c;
|
|
|
|
CHECK TABLE t1;
|
|
|
|
SELECT CHAR_LENGTH(b) FROM t1 WHERE a=4975;
|
|
|
|
DROP TABLE t1;
|
|
|
|
DROP PROCEDURE populate_t1;
|