-if APP_CONFIG.include?('hard_memory_limit') and Process.const_defined?(:RLIMIT_AS)
- Process.setrlimit Process::RLIMIT_AS, APP_CONFIG['hard_memory_limit']*1024*1024, Process::RLIM_INFINITY
+if defined?(HARD_MEMORY_LIMIT) and defined?(PhusionPassenger) and Process.const_defined?(:RLIMIT_AS)
+ Process.setrlimit Process::RLIMIT_AS, HARD_MEMORY_LIMIT*1024*1024, Process::RLIM_INFINITY