puma.patch

diff --git a/frameworks/Ruby/rack/config/puma.rb b/frameworks/Ruby/rack/config/puma.rb
index a0c5b2f17..b23b5fcb6 100644
--- a/frameworks/Ruby/rack/config/puma.rb
+++ b/frameworks/Ruby/rack/config/puma.rb
@@ -1,21 +1,26 @@
 # frozen_string_literal: true
 
-require_relative 'auto_tune'
 require 'sequel'
 
-# FWBM only... use the puma_auto_tune gem in production!
-num_workers, num_threads = auto_tune
+if RUBY_ENGINE == 'ruby'
+  require_relative 'auto_tune'
 
-workers num_workers
-threads num_threads, num_threads
+  # FWBM only... use the puma_auto_tune gem in production!
+  num_workers, num_threads = auto_tune
 
-before_fork do
-  Sequel::DATABASES.each(&:disconnect)
-end
+  workers num_workers
+  threads num_threads, num_threads
+
+  before_fork do
+    Sequel::DATABASES.each(&:disconnect)
+  end
 
-# Use the `preload_app!` method when specifying a `workers` number.
-# This directive tells Puma to first boot the application and load code
-# before forking the application. This takes advantage of Copy On Write
-# process behavior so workers use less memory.
-#
-preload_app!
+  # Use the `preload_app!` method when specifying a `workers` number.
+  # This directive tells Puma to first boot the application and load code
+  # before forking the application. This takes advantage of Copy On Write
+  # process behavior so workers use less memory.
+  #
+  preload_app!
+else if RUBY_ENGINE == 'jruby'
+  threads java.lang.Runtime.runtime.availableProcesses * 2
+end