Where would I set the maximum time a query will wait for a lock in MySQL 5.0.68 before timing out?


Other timeout settings that are general (not just for locks, since innodb_lock_wait_timeout only applies to InnoDB row locks) would be wait_timeout and interactive_timeout (both default to 28,800)

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By default, it is 50 seconds

Just set innodb_lock_wait_timeout as needed.

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If you hit the 50-sec InnoDB timeout, you have a poorly designed application!

That timeout exists to catch naughty things that cannot be caught any other way.

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    Or due to errors, I've an extremely busy mysql and mariadb server and deadlocks are a normal thing ot happen all the time. Even if "impossible". If you have a hundred million rows and ten thousands of sql command every second you'll find every sort of bug in mysql (crashes) as well as deadlocks of various sorts. – John Dec 19 '18 at 19:15
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    It depens to the situation. From the mysql docs: You might decrease this value for highly interactive applications or OLTP systems, to display user feedback quickly or put the update into a queue for processing later. You might increase this value for long-running back-end operations, such as a transform step in a data warehouse that waits for other large insert or update operations to finish. – g4b0 Sep 5 '19 at 7:38
  • Checking that application is poorly built...yep! – Noah Duncan Dec 18 '19 at 20:33

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