I had the same problem. I tried all the solution others has proposed, and unfortunately nothing worked. After spending hours on searching for the solution in Google I finally found this Open my.ini (my.cnf on linux-based systems and Mac) Look for [mysqld] Just below [mysqld] insert innodb_force_recovery = 1 Start MySQL Service Stop MySQL Service … Read more
InnoDB is a transactional engine. This means that in the following scenario: Session A inserts record 1 Session B inserts record 2 Session A rolls back , there is either a possibility of a gap or session B would lock until the session A committed or rolled back. InnoDB designers (as most of the other … Read more
I see that in the test mentioned in the above answer, the author basically proves it that when the UNIX time is calculated in advance, INT wins.
The answer to this question is much easier now: – Use Row Based Replication and Read Committed isolation level. The locking you were experiencing disappears. Longer explaination: http://harrison-fisk.blogspot.com/2009/02/my-favorite-new-feature-of-mysql-51.html
Database pages are the internal basic structure to organize the data in the database files. Following, some information about the InnoDB model: From 13.2.11.2. File Space Management: The data files that you define in the configuration file form the InnoDB tablespace. The files are logically concatenated to form the tablespace. […] The tablespace consists of … Read more
Quoting the Reference Manual (Setting the Storage Engine): If you omit the ENGINE option, the default storage engine is used. Normally, this is MyISAM, but you can change it by using the –default-storage-engine server startup option, or by setting the default-storage-engine option in the my.cnf configuration file. The default-storage-engine option must be part of the … Read more
add this to your my.cnf innodb_buffer_pool_size=1G restart your mysql to make it effect
Can’t you specify the Hibernate dialect and use hibernate.dialect=org.hibernate.dialect.MySQLInnoDBDialect Edit From MySQL version > 5.1 this should be hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect to avoid running into this issue Using “TYPE = InnoDB” in MySQL throws exception
From the manual: http://dev.mysql.com/doc/refman/5.1/en/alter-table.html For example, to convert a table to be an InnoDB table, use this statement: ALTER TABLE t1 ENGINE = InnoDB; The outcome of attempting to change a table’s storage engine is affected by whether the desired storage engine is available and the setting of the NO_ENGINE_SUBSTITUTION SQL mode, as described in … Read more
(As this turned up high in Google’s results, I thought a little more instruction might be handy.) MySQL has a convenient way to create empty tables like existing tables, and an atomic table rename command. Together, this is a fast way to clear out data: CREATE TABLE new_foo LIKE foo; RENAME TABLE foo TO old_foo, … Read more