How to set tag on a transaction?

[jeengbe]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/node

SDK Version

7.106.0

Framework Version

No response

Link to Sentry event

No response

SDK Setup

No response

Steps to Reproduce

a

Expected Result

Formless issue; I am genually confused about traces/transactions/spans.
I thought I understood how all goes together (a trace is a collection of transactions, a transaction is a collection of spans, scopes are pushed and popped within a transaction and enrich events generated within them), but recent deprecations have left me wondering.

I want to set a tag on a transaction ("cache.hit"), and it all seems pretty straightforward with Sentry.getActiveTransaction()?.setTag('cache.hit', true);, both methods now deprecated. So Sentry.getActiveSpan()?.setAttribute('cache.hit', true). This, however, ends up settings the tag as an attribute, and only on the very span the tag was set in.

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Also, unrelated to above, how do I prevent two separate transactions (minutes apart) from using the same trace ID? When a koa request comes in, I run the handler within Sentry.startSpan(() => { ... }), two transactions end up in the same trace. The only top-level "trace" method is Sentry.continueTrace, but that doesn't sound right.

Actual Result

a