Initial commit

config/initializers/memory_profiling.rb

@@ -0,0 +1,43 @@
+# See http://www.be9.io/2015/09/21/memory-leak/
+# This enables memory logging in order to check memory consumption (reproducing memory leaks)
+if ENV['MEMORY_REPORTING']
+  Thread.new do
+    while true
+      pid = Process.pid
+      rss = `ps -eo pid,rss | grep #{pid} | awk '{print $2}'`.to_i
+      Rails.logger.info "MEMORY[#{pid}]: rss: #{rss}, live objects #{GC.stat[:heap_live_slots]}"
+
+      sleep 5
+    end
+  end
+
+  require 'rack/gc_tracer'
+  Rails.configuration.middleware.use Rack::GCTracerMiddleware, view_page_path: '/gc_tracer', filename: 'log/gc.log'
+
+  require 'objspace'
+  ObjectSpace.trace_object_allocations_start
+
+  require 'rbtrace'
+  require 'memory_profiler'
+end
+
+module CartoDB
+  def self.memory_dump(filename)
+    require 'objspace'
+    # Dump classes (id -> name)
+    cls = ObjectSpace.each_object.inject(Hash.new(0)) do |h, o|
+      h[o.class.object_id] = o.class.name rescue 'ERR'
+      h
+    end
+    File.open(filename + '.classes', 'w') do |f|
+      JSON.dump(cls, f)
+    end
+
+    GC.start
+
+    # Dump objects
+    File.open(filename + '.dump', 'w') do |f|
+      ObjectSpace.dump_all(output: f)
+    end
+  end
+end