Unicorn has OobGC rack middleware that can be used to run GC.start
after a certain number of requests.
Is there a similar sort of thing in Phusion Passenger?
Hooking into PhusionPassenger::Rack::RequestHandler#process_request()
is the only mechanism I have found.
To do this in a similar way to the Unicorn OobGC, you can use the following module:
module PassengerOobGC
def self.install!(path, interval = 5)
self.const_set :OOBGC_PATH, path
self.const_set :OOBGC_INTERVAL, interval
@@oob_nr = interval
PhusionPassenger::Rack::RequestHandler.send :include, self
end
def self.included(base)
base.send :alias_method_chain, :process_request, :gc
end
def process_request_with_gc(env, *args)
process_request_without_gc(env, *args)
if OOBGC_PATH =~ env["PATH_INFO"] && ((@@oob_nr -= 1) <= 0)
@@oob_nr = OOBGC_INTERVAL
GC.start
end
end
end
and invoke it in an initializer with:
if defined?(PhusionPassenger::Rack::RequestHandler)
require 'passenger_oob_gc'
PassengerOobGC.install!(%r{^/admin/}, 3)
end