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The pg_stat_activity view shows information for aux processes, but the pg_stat_get_backend_wait_event() and pg_stat_get_backend_wait_event_type() functions did not. To fix, call AuxiliaryPidGetProc(pid) if BackendPidGetProc(pid) returns NULL, like we do in pg_stat_get_activity(). In version 17 and above, it's a little silly to use those functions when we already have the ProcNumber at hand, but it was necessary before v17 because the backend ID was different from ProcNumber. I have other plans for wait_event_info on master, so it doesn't seem worth applying a different fix on different versions now. Reviewed-by: Sami Imseih <samimseih@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Kyotaro Horiguchi <horikyota.ntt@gmail.com> Discussion: https://www.postgresql.org/message-id/c0320e04-6e85-4c49-80c5-27cfb3a58108@iki.fi Backpatch-through: 14
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.