mariadb-errors-deadlocks

Diagnose an InnoDB deadlock in MariaDB by reviewing the latest deadlock section in the SHOW ENGINE INNODB STATUS output to identify the transactions and locks involved.

ER_LOCK_DEADLOCK occurs when transactions form a circular wait dependency, whereas ER_LOCK_WAIT_TIMEOUT_EXCEEDED happens when a lock wait surpasses the configured timeout threshold.

Prevent MariaDB InnoDB deadlocks by implementing a strict lock-order discipline across transactions and optimizing transaction size to minimize the window for lock contention.

Yes, MariaDB deadlock detection requires version 10.6 or higher to utilize the InnoDB status checks and analysis features for identifying circular lock dependencies.

The best way to handle transaction retries after a deadlock is to implement automated retry strategies that re-execute the failed transaction while maintaining lock-order discipline.

MariaDB returns deadlock errors during high load times because concurrent transactions increasingly compete for the same InnoDB locks, raising the probability of circular lock dependencies.