Your App Might Be Down; Let's Fix It – Introducing Sentry Uptime Monitoring

Even at Sentry, we're not immune to downtime. In a moment of "oh-the-irony," we once took down our own application with a bad migration. We were adding a field ...

How to Debug and Log in PHP

This guide explains how errors work in PHP and how to debug them efficiently using logging functions and Sentry. The information in this guide is correct for PH...

Using a transformer–based text embeddings model to reduce Sentry alerts by 40% and cut through noise

Sentry uses Issue Grouping to aggregate identical errors and prevent duplicate issues from being created, and duplicate alerts being sent. One of the chief comp...

Maintain smooth game play with Sentry's game engine support

Sentry integrates directly with the tools you already use, giving you real-time crash and performance insights for Unity, Unreal Engine, and Godot. Unity: Catch...

How to get metrics, groups and alerts from your spans in Trace Explorer

We’ve all worked on that app that hangs just a little too long in weird places, or had that query we could never get to perform just right. The network waterfal...

A Guide to Logging and Debugging in Java

Logging and Debugging in Java: Why Does it Matter? During the development of your program, you might rely on simple println() statements to trace program execut...

Sentry's Pinia Integration for Vue and Nuxt Error Tracking

When debugging issues in production, context is everything. While Sentry already provides rich error data like stack traces, breadcrumbs, and user information, ...

Session Replay for Mobile is now Generally Available: See What Your Users See

Session Replay for Mobile is now generally available. I could bombard you with hyperbolic statements about why Session Replay is worth using, but instead, A…I… ...

How Profiling helped fix slowness in Sentry's AI Autofix

There’s a common misunderstanding that profiling is only useful for tiny savings that impact infra costs at scale - the so-called “milliseconds matter” approach...

Visual Studio App Center Retirement: Why Sentry is Your Next Step

We knew Visual Studio App Center was retiring, but with an official retirement date of March 31, 2025 and today being *checks calendar* 2025 already,* it’s time...

Taking Sentry’s Rollback from Hack Week Project to Production

❗❗If you’re a developer that uses Sentry and you’re reading this in 2024, stop reading and head to rollback.sentry.io to get your very own Rollback! Just a few ...

Debugging Query Rate Limiting in Sentry

Snuba, the primary storage and query service for event data that powers Sentry in production, has historically been doing rate limiting under the hood, making i...

Using server-side caching to speed up your applications, save on infra costs, and deliver better UX

If you’ve ever been floored by a sub-100ms response time, you’ve likely got caching to thank. Caching is the unsung hero of performance, shaving precious millis...

Debugging Python with VS Code and Sentry

Sentry is committed to helping developers fix broken code quickly and effectively. In this article, we’ll cover a range of intermediate to advanced techniques f...

Next.js debugging: tips and techniques from dev to prod

Debugging. It’s a critical skill for all developers. And when you’re building a dynamic, high-performance application with Next.js, Chrome DevTools, and console...

Building the Sentry Unreal Engine SDK with GitHub Actions

Ensuring a seamless player experience is critical for game developers, and yet unanticipated crashes and performance issues continue to harm games’ reputations ...

Missing indexes are slowing down your database - here's how to find and fix them with Sentry

Slow database queries drag down performance for both developers and users. They waste resources, slow down testing, and frustrate customers with laggy experienc...

Session Replay: Debug Faster without the Guesswork

As developers, we know that debugging can be a time-consuming process. Hunting down elusive bugs or trying to reproduce an issue based on vague user reports can...

Catching Flaky Tests Before It's Too Late

This is a guest post from Artem Zakharchenko, creator of MSWJS, an API mocking library for Javascript. He also writes about testing for EpicWeb and on his perso...

How I reduced an API call from >5 seconds to under 100ms

Given that 100% of the databases I have interacted with in my professional career have been SQL databases, my data-based mental model (please enjoy my pun) has ...

The New Way of React Native Debugging

This is a guest post from Simon Grimm, creator of Galaxies.dev, where Simon helps developers learn React Native through fast-paced courses and personal support....

How to reduce TTFB

TTFB (Time to First Byte) is a commonly used metric that measures the duration between a client's HTTP request and the receipt of the first byte of the server's...

Beyond Coverage: Flaky Test Detection, AI Test Generation, and More

We’re expanding beyond just code coverage and added a suite of new capabilities to help you break production less: AI PR Review, AI Test Generation, Test Analyt...

Fix slow sites faster with domain-specific Performance Insights, MongoDB support & Continuous Profiling on Sentry

Optimizing app performance can be challenging, even for seasoned developers. Frontends groan under the weight of bloated assets, backends lag from sluggish data...

AI-Powered Updates–Issue Grouping, Autofix, Anomaly Detection, and more

What if you could not only find software issues you care about but also have the fix ready? We just introduced several updates that intelligently group new issu...

Smarter search, Uptime Monitoring, and Session Replay updates to simplify your debugging

Whether it’s sitting through a meeting that should’ve been an email or reading a blog post written by AI 👀– no one enjoys losing time they’ll never get back. T...

Enabling Out-of-the-Box Performance Insights in Unity Games with the Sentry SDK

The Sentry Unity SDK has been effective for crash reporting, including: Support for line numbers in C# exceptions on IL2CPP (in release mode!) Capturing native ...

Avoid Rate Limiting with Query Batching

This post is part of our debugging series, where we share tricky challenges and solutions while building Sentry.  ~~~ On March 4th, 2024, the most metal inciden...

We Just Gave $750,000 to Open Source Maintainers

Sentry started out as an Open Source side project in 2008. Today we are a Fair Source company with 100,000+ organizations on our SaaS and $100M+ ARR, but we hav...

How we decreased P99s on our backend API requests by 3 seconds

At Sentry, we don't just build debugging tools for developers—we use them ourselves. This story demonstrates how we leveraged our own platform to solve a myster...

Distributed Tracing: A Powerful Mechanism for Application Debugging and Monitoring

Distributed Tracing is the process of tracking the flow and timing of requests as they pass through a system, which helps us understand the performance of that ...

6 Common Causes of Application Performance Issues

Application performance is critical for a seamless user experience, but all too often, developers find themselves struggling to pinpoint slowdowns. Understandin...

Automating tests and bug fixes with the Sentry extension for GitHub Copilot––because you have better things to do

TL;DR: The Sentry extension for GitHub Copilot now goes beyond chat to help you generate tests, surface issues, and suggests fixes all within your regular PR wo...

How to debug, log, and monitor performance in Node.js

You’re a good developer, that’s why when writing your Node.js application, you also wrote some unit tests to ensure your logic worked as expected. But what do y...

Debugging a Django Application

Debugging Django applications can be challenging, but it’s key to keeping your app running smoothly in production. From unexpected bugs to performance slowdowns...

Guide to Error & Exception Handling in React

No app is perfect. Even if we try our best to test all possible cases, sometimes things will go wrong. It only takes one failing request to get you in trouble. ...

Meet Sentry’s 2024 Summer Interns

Here at Sentry, we recognize the value of the fresh perspectives and innovative ideas that summer interns bring to the table. By offering internships, Sentry ho...

What’s the difference between API Latency and API Response Time?

Imagine waiting more than a few seconds for a page to load. Or even worse, imagine waiting more than a few seconds every time you perform any action in an app o...

Downtime happens, fix it faster - Uptime monitoring now in open beta

That moment when everything’s running smoothly—users engaged, conversions flowing—until your site takes a break, and you find out from a tweet. We’ve all been t...

Join the Pledge

Today we officially launch the Open Source Pledge. The Pledge started as an idea some years back: what if we could give back to Open Source on behalf of every e...

Atomic Repositories in Clean Architecture and TypeScript

You’re checking out on an e-commerce site. You have a cart with several items and quantities, and you click the checkout button. Under the hood, the operation f...

Debugging a Slack Integration with Sentry’s Trace View

While building Sentry, we also use Sentry to identify bugs, performance slowdowns, and issues that worsen our users’ experience. With our focus on keeping devel...

Observability and Tracing: How to Improve Your Debugging Workflow

Having the right tools to support debugging is crucial for improving application performance and delivering an enhanced user experience. Traditional observabili...

Sentry can’t fix React hydration errors, but it can really help you debug them

Hydration failed because the initial ui does not match what was rendered on the server. Don’t you just love hate it when that happens? If you’re building server...

Why Clean Architecture makes debugging easier

Let’s start with things we already know - complex projects are inherently hard to debug. The more complicated they are, the harder it is to debug them. The size...

How to Improve Your React Debugging Process

In this guide, you’ll gather how to identify and solve the most common bugs and performance issues. We’ll cover debugging client-side React, if you have a React...

Replaying Backend Errors using Sentry’s Session Replay

Session Replay is a powerful visual tool that captures user interactions, providing insights into the actions that resulted in errors. It records various activi...

How to Improve Your Android Debugging Process

Debugging Android apps has its unique challenges with crashes, ANRs, and inconsistent logs. But there are some easy ways to quickly identify and resolve issues,...

Everyone needs to know how to trace

It’s a bold claim for me to say that every developer can benefit from something 40% of them haven’t heard of, but hear me out. I was among the 40% who didn’t kn...

How to make your web page faster before it even loads

As developers (and as front end developers in particular), we usually talk about web performance in the context of measuring what happens when we start to see t...

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