With always-on tracing, you can now debug your real user requests without reproducing them.

Always-on tracing continuously collects traces from your production and preview traffic. Unlike session tracing , which only captures requests from your own browser, it samples your live traffic.

You control what's collected with sampling rules. Each rule sets a trace rate for an environment (All, Production, or Preview), optionally scoped to a path prefix like /checkout . Nothing is collected until you add a rule, so you pay only for what you choose to trace.

Configuring sampling rules for a project.

You can also manage sampling rules from the CLI.…