How upgrade your Passenger 3 to 4; and one more environment in RVM; Rails3; Ruby1.9

(passenger-4.0.37;nginx;RVM; passenger_ruby).rb

# Head nginx.config
http {
    passenger_root /usr/local/lib/ruby/gems/1.8/gems/passenger-4.0.37;
    passenger_ruby /usr/local/bin/ruby;
    passenger_default_user db2inst1;

#Optional:
# Permisson for db2inst1 in new gem passenger
chown root.db2grp1 -Rf /usr/local/lib/ruby/gems/1.8/gems/passenger-4.0.37
chmod 775 -Rf /usr/local/lib/ruby/gems/1.8/gems/passenger-4.0.37

#nginx.config
    server {
      # Using Ruby 1.9.3 and Rails3
      # It's necessary to put the path with 'wrappers'
      passenger_ruby /usr/local/rvm/wrappers/ruby-1.9.3-p484/ruby;
      listen 3010;
      server_name www.mysystem.com.br;
      
#Executing Nginx
rvm system
rvmsudo /usr/local/nginx/sbin/nginx