First step is to check your postgres logs.
These are on /storage/db/pg_data/pg_log
more postgresql.log
You may find, ERROR,XX001,”could not read block 0 in file “”base/8198863/8987722″”: read only 0 of 8192 bytes”,,,,,”automatic vacuum of table “”vrhb.public.docs_core_authcredentialsservicestate”””,,,,””
The fix to stop your database from growing.
psql vrhb
reindex table vrhb.public.docs_core_authcredentialsservicestate;
vacuum full reindex table vrhb.public.docs_core_authcredentialsservicestate;
\c vcac
vacuum analyze;
\q
You can verify that the messages are gone from your postgresql.log
