Set Up Performance

With performance monitoring, Sentry tracks your software performance, measuring metrics like throughput and latency, and displaying the impact of errors across multiple systems. Sentry captures distributed traces consisting of transactions and spans, which measure individual services and individual operations within those services. Learn more about our model in Distributed Tracing.

Configure the Sample Rate

First, enable both

1. Setting a uniform sample rate for all transactions using the TracesSampleRate option in your SDK config to a number between 0 and 1. (For example, to send 20% of transactions, set TracesSampleRate to 0.2.)
2. Controlling the sample rate based on the transaction itself and the context in which it's captured, by providing a function to the TracesSampler config option.

The two options are meant to be mutually exclusive. If you set both, TracesSampler will take precedence.

using Sentry;

// Add this to the SDK initialization callback
// Example uniform sample rate: capture 100% of transactions
options.TracesSampleRate = 1.0;

Learn more about how the options work in Sampling Transactions.

Verify

Test out

While you're testing, set TracesSampleRate to 1.0, as that ensures that every transaction will be sent to Sentry.

Once testing is complete, you may want to set a lower TracesSampleRate value, or switch to using TracesSampler to selectively sample and filter your transactions, based on contextual data.

Next Steps: