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Re: locking problems
Posted by: Heikki Tuuri
Date: February 13, 2005 04:21AM

Mike,

probably some other user has updated/deleted the end of the PRIMARY index. Therefore this insert is blocked:

------- TRX HAS BEEN WAITING 12 SEC FOR THIS LOCK TO BE GRANTED:
RECORD LOCKS space id 0 page no 6768 n bits 128 index `PRIMARY` of table `zeiterfa/Zeiterfassung` trx id 0 13974162 lock_mode X insert intention waiting
Record lock, heap no 1 PHYSICAL RECORD: n_fields 1; 1-byte offs TRUE; info bits 0
0: len 9; hex 73757072656d756d00; asc supremum ;;

That insert is holding the auto-inc lock. The other trx is waiting for that auto-inc lock.

http://dev.mysql.com/doc/mysql/en/innodb-next-key-locking.html

Best regards,

Heikki
Oracle Corp./Innobase Oy
InnoDB - transactions, row level locking, and foreign keys for MySQL

InnoDB Hot Backup - a hot backup tool for InnoDB which also backs up MyISAM tables
http://www.innodb.com/order.php

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