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# WARNING: New MRI releases are leaking memory in trivial Rails apps # Wed Jul 2 15:15:09 PDT 2008 # Ruby version Memory Trend #--------------------------------------- # 1.8.6p111 Ubuntu 37MB Stable # 1.8.6p230 Smartleaf 61MB Climbing # 1.8.6p238 SVN 62MB Climbing # To demonstrate this, create a minimal Rails application and use # the ApacheBench (ab) tool to generate traffic against it. # 1. Install dependencies gem install rails -v=2.1.0 --no-ri --no-rdoc gem install sqlite3-ruby mongrel --no-ri --no-rdoc # 2. Create Rails application rails sample pushd sample rm public/index.html ./script/generate scaffold thing rake RAILS_ENV=production db:migrate # 3. Watch memory consumption in another terminal watch -n1 'ps aux | egrep "mongrel|PID" | egrep -v egrep' # 4. Perform test mongrel_rails start --environment production --port 4444 --daemonize ab -c 10 -n 10000 http://localhost:4444/things # 5. Review memory consumption readings and stop mongrel mongrel_rails stop

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