[WIP] Telemetry Scaffold GC pressure health check

lib/rage/configuration.rb

@@ -1049,6 +1049,14 @@ def parse_disk_backend_options(opts)
   # @see Rage::Configuration::MiddlewareRegistry
   # @see Rage::Telemetry
   class Telemetry < MiddlewareRegistry
+    attr_accessor :gc_pressure_monitoring_enabled
+
+    # @private
+    def initialize
+      @gc_pressure_monitoring_enabled = false
+      super
+    end
+
     # @private
     # @return [Hash{String => Array<Rage::Telemetry::HandlerRef>}] a map of span IDs to handler references
     def handlers_map

lib/rage/telemetry/health_checks/gc_pressure_checker.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+module Rage::Telemetry
+  module HealthChecks
+    class GCPressureChecker
+      def gc_stats
+      end
+    end
+  end
+end

lib/rage/telemetry/health_checks/health_checks.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+require_relative "gc_pressure_checker"
+
+module Rage::Telemetry::HealthChecks
+  def self.__initialize
+    return unless Rage.config.telemetry.gc_pressure_monitoring_enabled
+
+    Iodine.run_every(1000) { GCPressureChecker.new.gc_stats }
+  end
+end
+
+if Iodine.running?
+  Rage::Telemetry::HealthChecks.__initialize
+else
+  Iodine.on_state(:on_start) { Rage::Telemetry::HealthChecks.__initialize }
+end

lib/rage/telemetry/telemetry.rb

@@ -121,4 +121,5 @@ def success?
 
 require_relative "tracer"
 require_relative "handler"
+require_relative "health_checks/health_checks"
 Dir["#{__dir__}/spans/*.rb"].each { |span| require_relative span }