Unexpected SQL queries to Postgres database on Rails/Heroku

Question

I was diving into a really long request to one of my Rails applications using NewRelic and found a number of SQL queries that appear entirely foreign that are taking up a signif

Answer 1

I was getting these queries when using Apartment Gem for multitenancy with Postgres Schemas. Apparently each excluded_model - a model that uses default schema - was generating one "pg_class" query in every request.

The guys from Apartment fixed it in version 0.25.0.