High CPU utilization of Postgres after updating to F 3.7/K 4.9.1

Problem:
Postgres is running at 100% CPU (command: postmaster) after updating. Analyzing a bit deeper shows commits running for 4h+, same with SQL statements.

Tried restarting the services, the server, to no avail.

There are no running tasks in Forman.

Expected outcome:
CPU should not be hogged.

Foreman and Proxy versions:
F 3.7.0
K 4.9.1

Foreman and Proxy plugin versions:

Distribution and version:
RockyLinux 8.8

Other relevant data:
Output from psql:

postgres=# SELECT  pid
, now() - pg_stat_activity.query_start AS duration, query, state
FROM pg_stat_activity
WHERE (now() - pg_stat_activity.query_start) >  interval '2 minutes';
  pid  |    duration     |                                                                                                                                    query                                                                                                                                    |        state
-------+-----------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------
 27977 | 04:21:02.731169 | SHOW max_identifier_length                                                                                                                                                                                                                                                  | idle
 27280 | 04:27:58.368644 | SET SEARCH_PATH TO public, "$user","public"                                                                                                                                                                                                                                 | idle in transaction
 35779 | 00:02:06.334108 | COMMIT                                                                                                                                                                                                                                                                      | idle
 27397 | 00:17:32.267334 | COMMIT                                                                                                                                                                                                                                                                      | idle
 28032 | 04:21:00.312294 | LISTEN "world:f03793db-f814-4d1e-8cba-51f70b348230"                                                                                                                                                                                                                         | idle
 28030 | 04:21:00.231867 | LISTEN "world:46351195-dd65-4098-8537-7b69260186bd"                                                                                                                                                                                                                         | idle
 28042 | 04:21:00.255052 | LISTEN "world:3684daf7-02f0-4853-8dbd-26291f4ce1b2"                                                                                                                                                                                                                         | idle
 28046 | 04:21:00.231453 | LISTEN "world:611155dd-b19a-409f-b2b6-60e857893802"                                                                                                                                                                                                                         | idle
 28044 | 04:21:00.0342   | COMMIT                                                                                                                                                                                                                                                                      | idle
 27938 | 04:21:12.616127 | SELECT a.attname                                                                                                                                                                                                                                                           +| idle
       |                 |   FROM (                                                                                                                                                                                                                                                                   +|
       |                 |          SELECT indrelid, indkey, generate_subscripts(indkey, 1) idx                                                                                                                                                                                                       +|
       |                 |            FROM pg_index                                                                                                                                                                                                                                                   +|
       |                 |           WHERE indrelid = '"foreman_internals"'::regclass                                                                                                                                                                                                                 +|
       |                 |             AND indisprimary                                                                                                                                                                                                                                               +|
       |                 |        ) i                                                                                                                                                                                                                                                                 +|
       |                 |   JOIN pg_attribute a                                                                                                                                                                                                                                                      +|
       |                 |     ON a.attrelid = i.indrelid                                                                                                                                                                                                                                             +|
       |                 |    AND a.attnum = i.indkey[i.idx]                                                                                                                                                                                                                                          +|
       |                 |  ORDER BY i.idx                                                                                                                                                                                                                                                            +|
       |                 |                                                                                                                                                                                                                                                                             |
 27959 | 04:21:07.100952 | LISTEN "world:a8c40e28-3d21-403c-ba3e-7b1147a31dbb"                                                                                                                                                                                                                         | idle
 27967 | 04:21:05.755084 | LISTEN "world:c600e696-ca73-48e1-97b6-8c863aa88141"                                                                                                                                                                                                                         | idle
 28051 | 04:20:59.979337 | COMMIT                                                                                                                                                                                                                                                                      | idle
 28053 | 04:20:59.997073 | COMMIT                                                                                                                                                                                                                                                                      | idle
 28060 | 04:20:59.782868 | COMMIT                                                                                                                                                                                                                                                                      | idle
 27396 | 04:27:14.224919 | SHOW TRANSACTION ISOLATION LEVEL                                                                                                                                                                                                                                            | idle
 28073 | 04:20:59.916761 | LISTEN "world:3b9b5b06-baf6-4d70-885a-0331d03f4329"                                                                                                                                                                                                                         | idle
 28092 | 04:20:59.625279 | COMMIT                                                                                                                                                                                                                                                                      | idle
 28086 | 04:20:59.724265 | LISTEN "world:61701e46-4c19-4286-91a1-2823d243e35a"                                                                                                                                                                                                                         | idle
 28094 | 04:20:59.522137 | COMMIT                                                                                                                                                                                                                                                                      | idle
 28160 | 04:19:13.749531 | LISTEN "world:9a0d4579-b32f-4af9-91cb-07b8781386e9"                                                                                                                                                                                                                         | idle
 28171 | 00:02:19.416345 | COMMIT                                                                                                                                                                                                                                                                      | idle
 35796 | 00:02:04.677418 | COMMIT                                                                                                                                                                                                                                                                      | idle
 28182 | 04:19:10.457003 | UPDATE "katello_events" SET "in_progress" = $1 WHERE "katello_events"."in_progress" = $2                                                                                                                                                                                    | idle
 25271 | 04:37:26.441562 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25272 | 04:38:04.202929 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25273 | 04:37:51.036916 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25274 | 04:37:50.386298 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25275 | 04:38:08.6714   | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25303 | 04:38:04.202929 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25315 | 04:37:51.036916 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25299 | 04:38:08.6714   | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25298 | 04:38:08.6714   | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25304 | 04:38:04.202929 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25314 | 04:37:51.036916 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 25316 | 04:37:50.386298 | SELECT "katello_rpms".* FROM "katello_rpms" WHERE "katello_rpms"."id" NOT IN (SELECT "katello_repository_rpms"."rpm_id" FROM "katello_repository_rpms" WHERE "katello_repository_rpms"."repository_id" IN (SELECT "katello_repositories"."id" FROM "katello_repositories")) | active
 35795 | 00:02:06.129208 | COMMIT                                                                                                                                                                                                                                                                      | idle
(37 rows)

Ok, after letting it run for almost 72 hours the utilization is now back to normal. Strange. Could it be some sort of a cleanup task running for a long time after the update?