Merge pull request #6 from supermomonga/release-resources

Exit Ruby process to release memory resource

lib/litestream/commands.rb

@@ -86,7 +86,12 @@ def self.replicate(argv = {})
 
       command = [executable, "replicate", *args]
       puts command.inspect
-      system(*command)
+
+      # To release the resources of the Ruby process, just fork and exit.
+      # The forked process executes litestream and replaces itself.
+      if fork.nil?
+        exec(*command)
+      end
     end
   end
 end