Resolving MySQL deadlock issues in a distributed team environment
Could someone explain After trying multiple solutions online, I still can't figure this out. Working alongside a remote team on a complex application, we've started noticing frequent deadlocks in our MySQL database, especially when multiple services are trying to access the same rows simultaneously. We are using MySQL version 8.0 and the InnoDB storage engine. Our schema has several tables with foreign key relationships, and we're using transactions extensively to maintain data integrity. Here’s a snippet of the transaction code that seems to be contributing to the deadlocks: ```sql START TRANSACTION; UPDATE orders SET status = 'processed' WHERE order_id = 1001; UPDATE inventory SET quantity = quantity - 1 WHERE product_id = 501; COMMIT; ``` Another service performing a similar operation is trying to update rows in the `inventory` table, which often leads to a deadlock. After reviewing the logs, we found that the deadlocks occur mostly during peak traffic times, so I’ve tried optimizing the order of our operations in the transaction, but it hasn’t helped much. We also implemented retry logic in our application, which catches the deadlock exception and retries the transaction after a short wait, but that’s more of a band-aid than a solution. Given that we’re working with a distributed architecture, ensuring that services are not stepping on each other’s toes is crucial. I’d like to know if there’s a more effective way to handle these deadlocks. Should we consider changing the isolation level, or maybe we need to restructure our transactions? Any guidance or best practices for managing MySQL deadlocks in a multi-service environment would be greatly appreciated. I'm coming from a different tech stack and learning Sql. This is happening in both development and production on CentOS. Any ideas how to fix this?