Does shortening the session timeout reduce what we store about visitors?
I am tuning data minimization as part of our privacy engineering work and have three questions.
- What exactly does the session timeout control?
- If I shorten it from the default, does less data get stored, or does the same data get cut into more sessions?
- I read there are grace windows for late-arriving events. What do those mean for my minimization assumptions
Suspect the timeout is the wrong lever but want to confirm before I write the internal recommendation.
1 answer
Your suspicion is correct, it is the wrong lever. In order:
-
The session inactivity timeout controls sessionization, meaning where one session ends and the next begins. Default is 30 minutes of inactivity, configurable from 1 minute to 24 hours, with an optional midnight expiration policy if you want sessions to never cross a calendar day.
-
Shortening it changes session boundaries, not volume. The same events get grouped into more, shorter sessions. Nothing is stored less; nothing is deleted sooner.
-
The grace windows reinforce that: late events have a 24-hour grace period, and sessions can reopen up to 48 hours. Those exist for data correctness, so a delayed event still lands in the right session, and they do not extend retention either.
The actual minimization levers for your recommendation are elsewhere: plan retention windows (profiles, sessions, and events kept 1, 30, or 60 days depending on plan), the 90-day analytics retention, the automatic deletion of profiles inactive for 90 days, and the anonymity scope setting (Application, Workspace, or Organization), which bounds how widely an anonymous identity is shared across your properties. Tune those, leave the timeout at whatever makes your analytics sensible.