ruby on rails - Assets compile failed with out of memory -

i try compile assets on production server, when run rake task compile - process goes long , error memory out.there trace

rails_env=production rake assets:precompile --trace ** invoke assets:precompile (first_time) ** invoke assets:environment (first_time) ** execute assets:environment ** invoke environment (first_time) ** execute environment ** invoke bower:before_precompile (first_time) ** execute bower:before_precompile ** execute assets:precompile rake aborted! execjs::runtimeerror: fatal error: evacuation allocation failed - process out of memory (execjs):1 /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/execjs-2.6.0/lib/execjs/external_runtime.rb:219:in `exec_runtime' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/execjs-2.6.0/lib/execjs/external_runtime.rb:39:in `exec' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/execjs-2.6.0/lib/execjs/external_runtime.rb:21:in `eval' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/execjs-2.6.0/lib/execjs/external_runtime.rb:46:in `call' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/uglifier-2.7.1/lib/uglifier.rb:212:in `run_uglifyjs' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/uglifier-2.7.1/lib/uglifier.rb:179:in `compile' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/sprockets-3.3.2/lib/sprockets/uglifier_compressor.rb:52:in `call' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/sprockets-3.3.2/lib/sprockets/uglifier_compressor.rb:28:in `call' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/sprockets-3.3.2/lib/sprockets/processor_utils.rb:75:in `call_processor' /home/ubuntu/staging/releases/21/vendor/bundle/ruby/2.2.0/gems/sprockets-3.3.2/lib/sprockets/processor_utils.rb:57:in `block in call_processors' 

i try run config.assets.compile = false same error, how can fix it? sorry bad english