How to check status of PostgreSQL server Mac OS X

Question

How can I tell if my Postgresql server is running or not?

I\'m getting this message:

[~/dev/working/sw] sudo bundle exec rake db:migrate 
rake aborte         


        

Answer 1

As of PostgreSQL 9.3, you can use the command pg_isready to determine the connection status of a PostgreSQL server.

From the docs:

pg_isready returns 0 to the shell if the server is accepting connections normally, 1 if the server is rejecting connections (for example during startup), 2 if there was no response to the connection attempt, and 3 if no attempt was made (for example due to invalid parameters).