DEFAULTS: &DEFAULTS
  adapter: postgresql
  encoding: unicode
  password:
  pool: 5
  username: postgres

development:
  <<: *DEFAULTS
  database: diffux_development

test:
  <<: *DEFAULTS
  database: diffux_test

production:
  database: diffux_production
  username: diffux

DEFAULTS: &DEFAULTS
  adapter: postgresql
  encoding: unicode
  password:
  pool: 25
  username: postgres

development:
  <<: *DEFAULTS
  database: diffux_development

test:
  <<: *DEFAULTS
  database: diffux_test

production:
  database: diffux_production
  username: diffux

Make DB connection pool as large as Sidekiq worker pool
Make DB connection pool as large as Sidekiq worker pool

I was reading through the Sidekiq documentation and found that they
recommend that the number of connections in the database pool closely
match the number of Sidekiq workers run (which by default is 25). This
commits makes that happen.

After applying this commit, you should see fewer errors in the Sidekiq
console log about not being able to open a database connection.
