Merge pull request #2418 from fgrehm/patch-1

Add heads up about deferred schema initialization

Author: rmosolgo

guides/schema/class_based_api.md

@@ -49,6 +49,10 @@ In general, each `.define { ... }` block will be converted to a class.
 
 See sections below for specific information about each schema definition class.
 
+### ⚠️ Heads up ⚠️
+
+Keep in mind that class based Schemas will be initialized at execution time instead of application boot, depending on the size of your schema, this could result in request timeouts for your users after your application restarts. For a workaround please check https://github.com/rmosolgo/graphql-ruby/issues/2034
+
 ### Type Instances
 
 The previous `GraphQL::{X}Type` objects are still used under the hood. Each of the new `GraphQL::Schema::{X}` classes implements a few methods: