Zed,
Very cool, finally got around to playing with StatusHandler and
StatisticsHandler. One thing that was missing that I wanted was insight
into _what_ the RailsHandler was working on, and what was queued up
while it sat in single-threaded mode -- ie., the current list of requests.
W/ the attached mongrel.conf, I hacked the RailsHandler to keep a hash
of active requests, and spit that out in the StatusHandler.
Any thoughts or feedback on this (attached)?
thanks,
Michael
[EMAIL PROTECTED] wrote:
Feature Requests item #4420, was opened at 2006-05-10 02:10
You can respond by visiting:
http://rubyforge.org/tracker/?func=detail&atid=5148&aid=4420&group_id=1306
Initial Comment:
It would be really nice to have some insight into what a production Mongrel
process is doing, in particular if it's stuck running a long-running Rails
process.
I'm thinking something like Apache's server-status, or maybe having it dump to
the log the list of queued requests in response to a signal.
----------------------------------------------------------------------
Comment By: Zed Shaw (zedshaw)
Date: 2006-05-23 05:57
Message:
Done and in svn. Take a look at examples/simpletest.rb for how it's used. I'll be documenting it, but basically add
stats = Mongrel::StatisticsFilter.new(:sample_rate => 1)
uri "/", :handler => stats
uri "/status", :handler => Mongrel::StatusHandler.new(:stats_filter => stats)
To a config/mongrel.conf and use -S to run it. Adjust sample rate to around 300
for a lower load.
class Mongrel::Rails::RailsHandler
@@guard = Mutex.new
@@active_requests = {}
def self.active_requests
@@guard.synchronize do
@@active_requests.values
end
end
alias_method :do_process, :process
def process(request, response)
path_info = request.params[Mongrel::Const::PATH_INFO]
@@guard.synchronize do
@@active_requests[Thread.current] = { :path => path_info, :start =>
Time.now }
end
do_process(request, response)
@@guard.synchronize do
@@active_requests.delete Thread.current
end
end
end
class Mongrel::StatusHandler
alias_method :describe_listener_basic, :describe_listener
def describe_listener
results = describe_listener_basic
if (rails_handler = listener.classifier.handler_map.values.flatten.find {
|h| h.is_a? Mongrel::Rails::RailsHandler })
t = Time.now
i = 0
active_requests = rails_handler.class.active_requests
results << "<h2>RailsHandler, #{active_requests.length} Active
Requests</h2>"
results << table("requests",
if active_requests.any?
active_requests.sort { |a,b| a[:start] <=> b[:start]
}.map do |req|
[i+=1, req[:path], "%0.2f seconds" % (t -
req[:start])]
end
else
["no active requests"]
end)
end
results
end
end
stats = Mongrel::StatisticsFilter.new(:sample_rate => 1)
uri "/", :handler => stats
uri "/server-status", :handler => Mongrel::StatusHandler.new(:stats_filter =>
stats)
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