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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.
61 lines
1.7 KiB
Plaintext
61 lines
1.7 KiB
Plaintext
#
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# Bug#16720368 INNODB CRASHES ON BROKEN #SQL*.IBD FILE AT STARTUP
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#
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SET GLOBAL innodb_purge_rseg_truncate_frequency=1;
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CREATE TABLE bug16720368_1 (a INT PRIMARY KEY) ENGINE=InnoDB;
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connect con1,localhost,root;
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CREATE TABLE bug16720368 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB;
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INSERT INTO bug16720368 (a) VALUES (1),(2),(3),(4),(5),(6),(7),(8);
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InnoDB 0 transactions not purged
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connection default;
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# Cleanly shutdown mysqld
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disconnect con1;
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# Corrupt FIL_PAGE_TYPE in bug16720368.ibd,
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# and recompute innodb_checksum_algorithm=crc32
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# restart
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SELECT COUNT(*) FROM bug16720368;
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ERROR 42S02: Table 'test.bug16720368' doesn't exist in engine
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INSERT INTO bug16720368 VALUES(1);
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ERROR HY000: Table test/bug16720368 is corrupted. Please drop the table and recreate.
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INSERT INTO bug16720368_1 VALUES(1);
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# Shut down the server to uncorrupt the data.
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# restart
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INSERT INTO bug16720368 VALUES(9,1);
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SELECT COUNT(*) FROM bug16720368;
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COUNT(*)
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9
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DROP TABLE bug16720368, bug16720368_1;
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#
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# Bug#16735660 ASSERT TABLE2 == NULL, ROLLBACK OF RESURRECTED TXNS,
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# DICT_TABLE_ADD_TO_CACHE
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#
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CREATE TEMPORARY TABLE t1 (a INT PRIMARY KEY) ENGINE=InnoDB;
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BEGIN;
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INSERT INTO t1 VALUES(42);
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connect con1,localhost,root;
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CREATE TABLE bug16735660 (a INT PRIMARY KEY) ENGINE=InnoDB;
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XA START 'x';
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INSERT INTO bug16735660 VALUES(1),(2),(3);
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XA END 'x';
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XA PREPARE 'x';
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connection default;
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# Kill the server
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disconnect con1;
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# Attempt to start without an *.ibd file.
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# restart
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FOUND 1 /\[ERROR\] InnoDB: Tablespace [0-9]+ was not found at .*test.bug16735660.ibd/ in mysqld.1.err
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# restart
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SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
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SELECT * FROM bug16735660;
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a
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1
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2
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3
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XA RECOVER;
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formatID gtrid_length bqual_length data
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1 1 0 x
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XA ROLLBACK 'x';
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SELECT * FROM bug16735660;
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a
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DROP TABLE bug16735660;
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