F.22. old_snapshot
The
old_snapshot
module allows inspection
of the server state that is used to implement
old_snapshot_threshold
.
F.22.1. Functions
-
pg_old_snapshot_time_mapping(array_offset OUT int4, end_timestamp OUT timestamptz, newest_xmin OUT xid) returns setof record -
Returns all of the entries in the server's timestamp to XID mapping. Each entry represents the newest xmin of any snapshot taken in the corresponding minute.