topic Re: RUM Traffic Control in Real User Monitoring

RUM Traffic Control

Irdina — Mon, 27 Apr 2026 11:11:36 GMT

Hi Dynatrace Community !

When I reduce RUM cost using traffic control, how does Dynatrace decide which user data or sessions to capture? Is it random sampling or based on certain rules?

Thanks!

Re: RUM Traffic Control

lubrman — Tue, 31 Mar 2026 05:35:12 GMT

Hi
@Irdina

Unfortunately, Dynatrace controls the injection automatically. The only way to manage which group to observe is via the ruxit API.

Re: RUM Traffic Control

Valentín — Wed, 01 Apr 2026 12:01:50 GMT

Hello Irdina,

The decision is made at page load time and remains consistent for the entire user session. If a session is not selected, it is skipped entirely and no RUM data is sent or stored.

This decision is taken by the JavaScript agent, which evaluates the configured RUM traffic control settings. The session is sampled deterministically, although the exact algorithm is not publicly documented.

I hope this helps clarify the behavior.