handyrep@john:~/handyrep$ pg_isready --version
pg_isready (PostgreSQL) 9.3.1
handyrep@john:~/handyrep$ pg_isready -h john -p 5432 -U postgres -d
postgres -q
pg_isready: missing "=" after "postgres" in connection info string
handyrep@john:~/handyrep$ pg_isready --host=john --port=5432
--user=postgres --dbname=postgres
pg_isready: missing "=" after "postgres" in connection info string
handyrep@john:~/handyrep$ pg_isready -h john -p 5432 -U postgres
john:5432 - accepting connections
so apparently the -d option:
a) doesn't work, and
b) doesn't do anything
I suggest simply removing it from the utility.
I'll note that the -U option doesn't appear to do anything relevant
either, but at least it doesn't error unnecessarily:
handyrep@john:~/handyrep$ pg_isready -h john -p 5432 -U no_such_user
john:5432 - accepting connections
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
