innodb lock wait timeout

Posted by shantanuo on Stack Overflow See other posts from Stack Overflow or by shantanuo
Published on 2010-03-08T10:51:18Z Indexed on 2010/05/28 14:11 UTC
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Filed under:

mysql

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timeout

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innodb

As per the documentation link given below:

When a lock wait timeout occurs, the current statement is not executed. The current transaction is not rolled back. (Until MySQL 5.0.13 InnoDB rolled back the entire transaction if a lock wait timeout happened. You can restore this behavior by starting the server with the --innodb_rollback_on_timeout option, available as of MySQL 5.0.32.

http://dev.mysql.com/doc/refman/5.0/en/innodb-parameters.html#sysvar_innodb_lock_wait_timeout

Does it mean that when a lock wait timeout occurs, it compromises the transactional integrity? "roollback on timeout" was the default behaviour till 5.0.13 and I guess that was the correct way to handle such situations. Does anyone think that this should be the default behaviour and the user should not be asked to add a parameter for a functionality that is taken for granted?

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