Correlation

Sessions

session_id (s_…) is the public browser session correlation identity. It is not anonymousId, not an auth token, and not invented from time ranges.

Public session id

The Browser SDK generates a tab-scoped s_… id in sessionStorage. Same-origin requests may send it as X-Mydle-Session-ID. Persist it on backend spans/logs when you want session-wide joins.

Joins

Session → logs: browser_sessions.session_id equals log_entries.session_id.
Session → traces: equal session_id on stored traces.
Log search: session: / sessionid:.

API

GET /api/app/correlation?type=session&id=s_… returns DIRECT references when stored.

Limitations

Internal bsess_* row ids are not product correlation keys.
anonymousId does not join to traces or logs.

Correlation

Sessions

session_id (s_…) is the public browser session correlation identity. It is not anonymousId, not an auth token, and not invented from time ranges.

Public session id

The Browser SDK generates a tab-scoped s_… id in sessionStorage. Same-origin requests may send it as X-Mydle-Session-ID. Persist it on backend spans/logs when you want session-wide joins.

Joins

Session → logs: browser_sessions.session_id equals log_entries.session_id.
Session → traces: equal session_id on stored traces.
Log search: session: / sessionid:.

API

GET /api/app/correlation?type=session&id=s_… returns DIRECT references when stored.

Limitations

Internal bsess_* row ids are not product correlation keys.
anonymousId does not join to traces or logs.

Sessions

Public session id

Joins

API

Related

Sessions

Public session id

Joins

API

Related