MySQL - What Is a Dead Lock in MySQL

What Is a Dead Lock in MySQL

Q

What Is a Dead Lock in MySQL?

✍: FYIcenter.com

A

A dead lock is phenomenon happens between two transactions with each of them holding a lock that blocks the other transaction as shown in the following diagram:

(transaction 1)                    (transaction 2)
update row X to create lock 1
                                  update row Y to create lock 2
                                  update row X
                                  (blocked by lock 1)
update row Y
(blocked by lock 2)

(dead lock created)

⇒Transaction Management: Commit or Rollback in MySQL

⇒⇒MySQL Database Tutorials

2017-04-28, 800👍, 0💬

Error: Deadlock Found When Trying to Get Lock in MySQL
What Happens to Your Transactions When ERROR 1213 Occurred in MySQL? If your transaction receives the "Deadlock found when trying to get lock" - ERROR 1213, MySQL server automatically terminates your transaction and rolls back your data changes of the entire transaction. This is why the error messag... 2017-07-21, 1212👍, 0💬

What Is a Dead Lock in MySQL
What Is a Dead Lock in MySQL? A dead lock is phenomenon happens between two transactions with each of them holding a lock that blocks the other transaction as shown in the following diagram: (transaction 1) (transaction 2) update row X to create lock 1 update row Y to create lock 2 update row X (blo... 2017-04-28, 801👍, 0💬

Transaction Waiting for a Data Lock in MySQL
How Long a Transaction Will Wait for a Data Lock in MySQL? If you issue a UPDATE or DELETE statement on a row that has an exclusive lock owned by another session, your statement will be blocked to wait for the other session to release the lock. But the wait will be timed out after the predefined inn... 2017-04-28, 791👍, 0💬

Experiment with Dead Locks in MySQL
How To Experiment Dead Locks in MySQL? If you want to have some experience with dead locks, you can create two windows running two mysql transactions in two sessions at the REPEATABLE READ transaction isolation level. Then run some UPDATE statements as shown in the tutorial exercise below: (session ... 2017-07-21, 646👍, 0💬

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