NOTES:
-- most statements for db c01 in one catalog vacuum session
-- database c01 is oid 16404
-- applications run as user 'app'
-- vacuums run as user postgres
-- somewhat redacted

MM:SS.ms   pid    user  log text
---------  -----  ----  -----------------------------------------------------

03:00.350  2716   c01  postgres  vacuum full pg_catalog.pg_class;
03:00.507  2866  LOG: process 2866 acquired ShareUpdateExclusiveLock on relation 2604 of database 16416 after 10143.750 ms
03:01.222  21685  c01  app   11100.670 ms
03:01.223  21685  c01  app  SELECT DISTINCT
03:01.224  21685  c01  app   1.524 ms
03:02.031  3001   c01  app  connection authorized: user=app database=c01
03:04.952  2787  LOG: process 2787 still waiting for AccessShareLock on relation 1259 of database 16412 after 5001.035 ms
03:05.065  2787  LOG: process 2787 acquired AccessShareLock on relation 1259 of database 16412 after 5114.253 ms
03:05.564  2977  LOG: process 2977 still waiting for AccessShareLock on relation 1259 of database 16404 after 5000.970 ms
03:05.640  2731  LOG: process 2731 still waiting for RowExclusiveLock on relation 1259 of database 16404 after 5000.186 ms
03:06.045  2977  LOG: process 2977 acquired AccessShareLock on relation 1259 of database 16404 after 5482.389 ms
03:06.045  2731  LOG: process 2731 acquired RowExclusiveLock on relation 1259 of database 16404 after 5405.652 ms
03:06.046  2731  ERROR: could not find pg_class tuple for index 2662
03:06.046  2731  CONTEXT: automatic vacuum of table "c01.pg_catalog.pg_index"
03:06.046  2731  ERROR: could not find pg_class tuple for index 2662
03:06.046  2716   c01  postgres   5696.537 ms
03:06.056  3001   c01  app  SET SESSION TIME ZONE 'UTC'; ...
03:06.057  2716   c01  postgres  vacuum full pg_catalog.pg_rewrite;
03:06.066  3001   c01  app   10.459 ms
03:06.091  3001   c01  app  disconnection: session time: 0:00:04.085 user=app database=c01 host=xxxl01
03:08.908  3006  LOG: process 3006 still waiting for AccessShareLock on relation 2659 of database 16407 after 5000.778 ms
03:11.777  21685  c01  app  SELECT
03:11.779  21685  c01  app   2.296 ms
03:11.779  21685  c01  app  SELECT
03:11.780  21685  c01  app   0.328 ms
03:11.798  21685  c01  app  SELECT
03:11.799  21685  c01  app   0.348 ms
03:11.800  21685  c01  app  SELECT
03:11.800  21685  c01  app   0.205 ms
03:11.804  21685  c01  app  SELECT
03:11.805  21685  c01  app   0.589 ms
03:11.806  21685  c01  app  SELECT DISTINCT
03:11.809  21685  c01  app   3.552 ms
03:11.810  21685  c01  app  SELECT
03:12.554  21685  c01  app   744.233 ms
03:12.555  21685  c01  app  SELECT DISTINCT
03:12.556  21685  c01  app   1.136 ms
03:13.153  2716   c01  postgres   7096.367 ms
03:13.182  2716   c01  postgres  vacuum full pg_catalog.pg_depend;
03:16.926  2716   c01  postgres   3743.880 ms
03:16.937  2716   c01  postgres  vacuum full pg_catalog.pg_type;
03:20.460  2716   c01  postgres   3523.571 ms
03:20.492  2716   c01  postgres  disconnection: session time: 0:02:06.916 user=postgres database=c01 host=xxxb-0