[tor-bugs] #12655 [Onionoo]: Add performance statistics to Onionoo's servlet

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#12655: Add performance statistics to Onionoo's servlet
-------------------------+-------------------------
 Reporter:  karsten      |          Owner:  karsten
     Type:  enhancement  |         Status:  new
 Priority:  normal       |      Milestone:
Component:  Onionoo      |        Version:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
-------------------------+-------------------------
 n8fr8 plans to release an Orbot version that queries relay information via
 Onionoo.  There are quite a few Orbots deployed, so this might put some
 load on Onionoo.  We should add some simple performance statistics to
 Onionoo to detect load problems early.

 To start with, let's add statistics for the following request, which is
 the first request that n8fr8 plans to add to Orbot (it's also the standard
 request that Atlas and Globe make to show relay details):

 {{{
 https://onionoo.torproject.org/details?lookup=$fingerprint
 }}}

 Some simple metrics to start with might be:

  - Number of requests per 1, 5, 15 minutes
  - Time to parse request, time to build response, time to send response

 What I'm not sure about yet is where to store and display these
 statistics.  We could start with heartbeat log messages containing these
 numbers.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12655>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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