How a Retailer Fixed Magento Checkout Deadlocks During High-Traffic Surges

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A large retailer running Adobe Commerce faced repeated checkout deadlocks during traffic spikes, leading to timeouts, abandoned carts, and database locking issues. The root cause was multiple concurrent transactions competing for the same MySQL resources during inventory reservation, quote updates, and order placement. Engineers addressed this by splitting large database transactions into smaller atomic units, applying optimistic locking, and adding retry logic to handle deadlocks gracefully. Infrastructure improvements included deploying MySQL read replicas, optimizing Redis cluster configuration for session management, and using AWS autoscaling to handle demand surges. Varnish Cache was also tuned to absorb burst traffic, collectively reducing checkout latency and protecting conversion rates under peak load.

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New Databricks Tool Bars LLMs from Doing Cost Arithmetic to Prevent Financial Errors

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

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ProgrammingDEV Community ·

Developer builds browser-only JSON toolkit using WebGPU to keep data private

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