Ruby on Rails local PostgreSQL does not return results after a while

Ruby on Rails local PostgreSQL does not return results after a while

References

Reference NO 1

http://stackoverflow.com/questions/13587725/ruby-on-rails-local-postgresql-does-not-return-results-after-a-while

Reference NO 2

http://stackoverflow.com/questions/8465508/can-not-connect-to-local-postgresql

Reference NO 3

http://stackoverflow.com/questions/4735450/using-postgresql-and-jsondb-in-the-same-web-app

Reference NO 4

http://stackoverflow.com/questions/17183426/why-is-find-by-sql-not-working-with-postgresql

Reference NO 5

http://www.endpoint.com/blog_archive/postgresql

Reference NO 6

https://blog.engineyard.com/2013/using-postgresql-hstore-in-a-rails-application-on-engine-yard-cloud

Reference NO 7

http://www.mikeperham.com/2012/05/05/five-common-rails-mistakes/

Reference NO 8

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