---
title: "Why Does a Database Query Get Much Slower After Deployment?"  
description: "Why Does a Database Query Get Much Slower After Deployment?"  
author: "Ruslan Galiev"  
published: 2026-10-15  
canonical: https://answers.mindstick.com/qa/117526/why-does-a-database-query-get-much-slower-after-deployment  
category: "Mix Category"  
tags: ["Databases", "Coding", "troubleshooting"]  
reading_time: 1 minute  

---

# Why Does a Database Query Get Much Slower After Deployment?

A query that takes a fraction of a second on my development machine is timing out after deployment. The code and database engine are the same, so I’m trying to work out what changes between the two environments.

Could the difference come from production data volume, missing or stale indexes, connection pooling, or a different query plan? What would you compare first when investigating a **query plan difference** between local and production databases?


---

Original Source: https://answers.mindstick.com/qa/117526/why-does-a-database-query-get-much-slower-after-deployment

Copyright © MindStick Software Pvt. Ltd. This Markdown version is provided for developers, AI systems, and offline reading.