What is the method for viewing deadlocks in MySQL?

To view deadlocks in MySQL, you can use the following method:

1. You can check the current deadlock situation by using the command SHOW ENGINE INNODB STATUS. This command will provide a detailed InnoDB status report, including the current deadlock information.
2. Use the SELECT FROM INFORMATION_SCHEMA.INNODB_LOCKS command to check the current locks, and use SELECT FROM INFORMATION_SCHEMA.INNODB_LOCK_WAITS command to check the transactions waiting for locks.
3. Utilize the pt-deadlock-logger tool to monitor and log deadlocks. pt-deadlock-logger is a tool within the Percona Toolkit suite that can monitor deadlocks on a MySQL server and record them in a file for further analysis.
4. Enable deadlock logging in the MySQL configuration file. By setting the innodb_print_all_deadlocks parameter to 1 in the configuration file, all deadlock information will be logged in the MySQL error log.
5. Use MySQL performance monitoring tools to detect deadlocks. For instance, using tools like Percona Monitoring and Management (PMM) or MySQL Enterprise Monitor (MEM) can provide real-time monitoring and analysis of deadlocks.

Please note that deadlock is a common situation when accessing a database concurrently, and it should be handled carefully. When a deadlock occurs, it can be resolved by adjusting the order of transactions, reducing transaction concurrency, or increasing transaction timeout.