How We Prevented Magento Checkout Deadlocks for a Big Retailer During Traffic Surges

Short summary

During traffic surges, a major retailer's Adobe Commerce checkout experienced deadlocks that increased latency and cart abandonment. The team implemented a multi-layered fix: breaking large transactions into atomic units, adding optimistic locking and retry logic, tuning MySQL settings, caching session data in Redis, and auto-scaling AWS infrastructure. These changes improved checkout speed and maintained conversion rates under peak load.

• •Magento checkout deadlocks caused increased latency, timeouts, and abandoned carts during traffic spikes
• •Multi-layered solution: transaction splitting, optimistic locking, MySQL tuning, Redis caching, AWS auto-scaling
• •Results: reduced checkout latency and maintained conversion rates under peak load

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