👀 Views: 16 💬 Answers: 1 📅 Created: 2025-07-22

MySQL PDO deadlock PHP

I'm relatively new to this, so bear with me... Hey everyone, I'm running into an issue that's driving me crazy. I just started working with I'm deploying to production and Quick question that's been bugging me - I'm working with a persistent scenario with deadlocks when performing high concurrency insert operations into a MySQL 8.0 table. I have a table called `orders` with the following structure: ```sql CREATE TABLE orders ( id INT AUTO_INCREMENT PRIMARY KEY, customer_id INT NOT NULL, order_date DATETIME DEFAULT CURRENT_TIMESTAMP, status VARCHAR(20), INDEX (customer_id) ) ENGINE=InnoDB; ``` I'm using PHP with PDO to insert new orders. In a scenario where multiple users are placing orders simultaneously, I often receive an behavior `behavior Code: 1213. Deadlock found when trying to get lock; try restarting transaction`. I've tried wrapping my inserts in transactions, but the deadlocks still occur. Here's a simplified version of my insertion logic: ```php try { $pdo->beginTransaction(); $stmt = $pdo->prepare("INSERT INTO orders (customer_id, status) VALUES (:customer_id, :status)"); $stmt->execute([':customer_id' => $customerId, ':status' => 'pending']); $pdo->commit(); } catch (Exception $e) { $pdo->rollBack(); if ($e->getCode() == 1213) { echo "Deadlock detected: " . $e->getMessage(); } else { echo "behavior: " . $e->getMessage(); } } ``` I've tried a few approaches to mitigate deadlocks, such as ensuring consistent order of row locks and increasing the transaction isolation level to `SERIALIZABLE`, but the question continues. The application has a important load, and I need a solution that allows multiple concurrent inserts without leading to deadlocks. Any insights or best practices on how to manage this situation effectively would be greatly appreciated! I'm working on a API that needs to handle this. My development environment is Linux. I'm using Php 3.10 in this project. Thanks, I really appreciate it! My team is using Php for this application. Thanks for any help you can provide! I'm on macOS using the latest version of Php. Thanks, I really appreciate it! Any advice would be much appreciated.