pg_stat_gssapi

The pg_stat_gssapi view provides per-connection statistics related to GSSAPI (Generic Security Services Application Program Interface) authentication and encryption. Each row corresponds to a backend process and includes information such as whether GSSAPI authentication was used, the principal name, whether encryption is enabled, and whether credentials are delegated. This view can be joined with pg_stat_activity or pg_stat_replication using the pid column to obtain more details about each connection.

column	type	references	description
pid	integer		Process ID of a backend.
gss_authenticated boolean	boolean		True if GSSAPI authentication was used for this connection.
principal	text		Principal used to authenticate this connection, or NULL if GSSAPI was not used to authenticate this connection. This field is truncated if the principal is longer than NAMEDATALEN (64 characters in a standard build).
encrypted	boolean		True if GSSAPI encryption is in use on this connection.