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Production Usage

There are multiple tips and suggestions which must be acknowledged while running RoadRuner on production.

  • database connections and any pipe/socket is the potential point of failure. Close all the connections after each iteration
  • make sure to close all descriptors (especially in case of fatal exceptions)
  • [optional] consider calling gc_collect_cycles after each execution if you want to keep the memory low (this will slow down your application a bit)
  • watch memory leaks - you have to be more picky about what components you use. Workers will be restarted in case of a memory leak but it should not be hard to completely avoid this issue by properly designing your application
  • watch the state pollution (i.e. globals or user data cache in memory)
  • make sure NOT to listen 0.0.0.0 in RPC service (unless in Docker)
  • connect to a worker using pipes for higher performance (Unix sockets just a bit slower)
  • tweak your pool timings to the values you like
  • a number of workers = number of CPU threads in your system, unless your application is IO bound, then pick the number heuristically
  • consider using maxJobs for your workers if you experience any issues with application stability over time
  • RoadRunner is +40% performant using Keep-Alive connections
  • setup memory limit at least 10-20% below max_memory_usage
  • since RoadRunner workers run from cli you need to enable OPcache in CLI via opcache.enable_cli=1
  • make sure to use health check endpoint when running rr in a cloud environment