The PasengerCollector collects CPU and memory utilization of apache, nginx and passenger processes. It also collects requests in top-level and passenger applications group queues.

Four key attributes to be published:

  • phusion_passenger_cpu
  • total_apache_memory
  • total_apache_procs
  • total_passenger_memory
  • total_passenger_procs
  • total_nginx_memory
  • total_nginx_procs
  • top_level_queue_size
  • passenger_queue_size


  • passenger-memory-stats
  • passenger-status


Setting Default Description Type
bin /usr/lib/ruby-flo/bin/passenger-memory-stats The path to the binary str
byte_unit byte Default numeric output(s) str
enabled False Enable collecting these metrics bool
measure_collector_time False Collect the collector run time in ms bool
metrics_blacklist None Regex to match metrics to block. Mutually exclusive with metrics_whitelist NoneType
metrics_whitelist None Regex to match metrics to transmit. Mutually exclusive with metrics_blacklist NoneType
passenger_memory_stats_bin /usr/bin/passenger-memory-stats The path to the binary passenger-memory-stats str
passenger_status_bin /usr/bin/passenger-status The path to the binary passenger-status str
sudo_cmd /usr/bin/sudo Path to sudo str
use_sudo False Use sudo? bool

Example Output