PERF: add connection pool drainer to keep connection counts down

config/initializers/99-drain_pool.rb

@@ -0,0 +1,13 @@
+# pg performs inconsistently with large amounts of connections
+# this helps keep connection counts in check
+Thread.new do
+  while true
+    sleep 30
+    pools = []
+    ObjectSpace.each_object(ActiveRecord::ConnectionAdapters::ConnectionPool){|pool| pools << pool}
+
+    pools.each do |pool|
+      pool.drain(30.seconds)
+    end
+  end
+end