The inclusive offset range on one source partition that holds the payloads
of a timeline page. A range is a hint for bounded polls, not a promise that
every offset in it belongs to the session.
Change rows after a sequence. On a series mismatch floor is the newest
sequence and resync is set. Otherwise floor is the oldest retained
sequence, or the next one when none is retained, and resync is set when
after + 1 < floor, even with rows present. On resync the reader adopts
series and floor and lists sessions again.
The body of one process heartbeat on agent.heartbeats: the sessions in
one stream that the process holds leases on. A process with sessions in
several streams writes one heartbeat per stream.
How far the session index has folded one source partition. Offsets are
never compared across topics. topic_generation is the topic creation time
in microseconds, so a recreated topic with a reused id is a different source.