What is the difference between Sentry and traditional logging?

Traditional logging provides you with a trail of events. Some of those events are errors, but many times they’re simply informational. Sentry is fundamentally different because we focus on exceptions, or in other words, we capture application crashes. We discuss in more detail here and on our blog.

What languages does Sentry support?

Sentry supports every major language, framework, and library. You can browse each of them here .

How much does Sentry cost?

You can get started for free. Pricing depends on the number of monthly events, transactions, and attachments that you send Sentry. For more details, visit our pricing page .

Tornado Error Monitoring

Actionable insights to resolve Tornado performance bottlenecks and errors. Improve your monitoring workflow with a full view of releases so you can mark Tornado errors as resolved and prioritize live issues.

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Getting Started is Simple

Install our Python SDK using pip:

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pip install --upgrade sentry-sdk

Initialize the Python SDK with the Tornado integration in your settings.py file.

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import sentry_sdk
from sentry_sdk.integrations.tornado import TornadoIntegration

sentry_sdk.init(
    dsn="https://[email protected]/0",
    integrations=[
        TornadoIntegration(),
    ],

    # Set traces_sample_rate to 1.0 to capture 100%
    # of transactions for Tracing.
    # We recommend adjusting this value in production,
    traces_sample_rate=1.0,
)

# Your app code here, without changes

class MyHandler(...):
    # ...

Check our documentation for the latest instructions.

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Tornado Performance Monitoring

Within minutes after installing Sentry, software teams are able to trace Tornado performance issues back to a poor performing API call as well as surface all related code errors. Engineering Managers and Developers now have a single tool to optimize performance of their code and deliver fast customer experiences with Performance Monitoring.

Tornado Error Monitoring with Complete Stack Traces

See local variables in the stack for prod errors, just like in your dev environment. Introspect more deeply into the runtime and jump into the frame to get additional data for any local variable. Filter and group Tornado exceptions intuitively to eliminate noise.

Fill In the Blanks About Tornado Errors

Expose the important events that led to each Tornado exception: SQL queries, debug logs, network requests, past errors. Learn in which version a bug first appeared, merge duplicates, and know if things regress in a future release.

Sentry helps our team fix the most important issues in each release.”

See the Full Picture of Any Tornado Exception

Aggregate errors by details like HTTP request, hostname, and app version to see what’s new, a priority, or a trend.

Assign custom tags to reproduce the error environment specific to your application, business, and users.

Find answers to key questions: How actionable is this error? In which app release did the Tornado bug occur?

FAQs

Sentry doesn’t impact a web site’s performance.

If you look at the configuration options for when you initialize Sentry in your code, you’ll see there’s nothing regarding minimizing its impact on your app’s performance. This is because our team of SDK engineers already developed Sentry with this in mind.

Sentry is a listener/handler for errors that asynchronously sends out the error/event to Sentry.io. This is non-blocking. The error/event only goes out if this is an error.

Global handlers have almost no impact as well, as they are native APIs provided by the browsers.

Supporting Resources

How Slow is Slow?

Eventbrite Customer Story

Resolve Tornado errors with max efficiency, not max effort