The PostgreSQL cluster is in recovery (or is a streaming replication standby). You can find out if that is the case by running
The parameter default_transaction_read_only is set to on. Diagnose with
The current transaction has been started with. You can find out if that is the case using the undocumented parameter
where is pgdata?
Replication user is active?
select * from pg_stat_activity where usename = 'replicator';
PSQL Listing Commands
\x on; --extended display
\c db; --connect to database
\du+; --list users
\dt+ schema.tablename; --lists tables
\d+ schema.tablename; -- gives description of table