Monitoring & Debugging a Checkout Flow in Flask & React

When your checkout flow breaks, customers disappear faster than most ‘cutting-edge’ JS metaframeworks. Thankfully, setting up observability for your critical pa...

Sentry’s AI debugger now references traces for troubleshooting distributed systems

Debugging is an ever-present pain for all developers, and that will continue despite, or maybe even thanks to, the rise of AI-written code. Tools like Sentry ha...

Common Downtime Causes and How Website Monitoring Can Help

Downtime only shows up at the most inconvenient moments — like right after a 'quick deploy' or during the five minutes you dared to step away. Maybe it’s a traf...

Publish Button Test

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Debug App Performance Down to the Function Call–Introducing Continuous Profiling & UI Profiling

When something slows down in prod, it’s too easy to fall into old habits. Throw in a few more logs, ship some metrics, try to reproduce the issue locally, and m...

How Sentry's AI Autofix Changed my Mind About AI Assistants

Blockchain, IoT, Big Data. If you’ve been around in tech for a while, you know that these kinds of buzzwords come and go: they make a splash going in and fizzle...

Vercel is adding a new marketplace category and Sentry is in(to) it

More people will build and ship applications in the next year than in the 10 years previous. As more applications make their way into “launched”, by developers ...

How to Improve Performance in PHP

PHP apps can be deceptively simple — until something starts slowing down. Maybe it’s a page load that takes a few seconds too long, or maybe your server costs a...

Investigating an ‘[Object] not found’ error in Next.js with Tracing in Sentry

Breakpoints and console.log statements might save your sanity during local dev, but production issues are another story. In prod, your errors might be distribut...

Practical Tips on Handling Errors and Exceptions in Python

Have you ever encountered a confusing error message that left you wondering what went wrong in your Python code? You’re not alone. Even the most experienced dev...

JavaScript needs Debug IDs

A couple months ago Sentry created a brand new NPM organization (namespace) for debug ids and published a set of packages under that namespace: https://www.npmj...

Dashboard updates: Fewer clicks, more control, faster widget building

You're reviewing your production metrics when suddenly an error spike appears on your dashboard. Your immediate thought isn't "how do I build a new view to inve...

Anomaly Alerts Now in Open Beta: Smarter Monitoring, Fewer False Alarms

A few weeks ago, we introduced anomaly alerts to early adopters. Today, we’re excited to announce that anomaly alerts are officially in open beta and available ...

A Guide to Logging in React Native

Basic console logging is a good starting point for debugging and understanding an app. For larger, more complex apps, it’s helpful to include additional informa...

PlayStation, Xbox, Switch, PC, or Mobile — wherever you’ve got bugs to crush, Sentry can help

Whether it's a boss fight freeze or a sudden disconnect in multiplayer, crashes break immersion and make your players mad. Debugging these issues across multipl...

AI Agents: Hype or Reality?

A few years ago, it was all about Blockchain; before that, IoT, then Big Data, and even earlier, the Cloud. Each era brought a paradigm shift of sorts, drawing ...

Fix slow mobile apps before your users uninstall with Mobile Vitals

Mobile devs know the struggle. Small regressions can cause big issues in production, and fixing them isn't as easy as pushing a quick patch. Unlike a web app, s...

React.js Performance Guide

Which JS framework is the most performant? React, Vue, Svelte, Angular,…? When trying to answer this question, we often get lost in comparing benchmarks for rea...

Breakpoint recap: Uptime Monitoring, robots, and feature flags galore

Bugs don’t announce themselves politely. They crash your checkout flow, break authentication, or slow your API to a crawl—usually right before your CEO asks how...

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 ...

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