What is a Postgres “session”?

Question

What is a Postgres "session" in the context of session-level advisory locks ? Can two threads/processes share the same session?

Answer 1

According to this thread , a session is "synonymous with a TCP connection". The language in Session Information Functions also supports this.

So, in the context of a session-level advisory lock, anything that shares the TCP connection will have access to the resource, and the resource won't be released unless explicitly unlocked, or the TCP connection is terminated.