[metrics-bugs] #22236 [Metrics/Metrics website]: Add new graph showing directory traffic as percentage of all traffic

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#22236: Add new graph showing directory traffic as percentage of all traffic
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     Reporter:  karsten                  |      Owner:  metrics-team
         Type:  enhancement              |     Status:  new
     Priority:  Medium                   |  Milestone:
    Component:  Metrics/Metrics website  |    Version:
     Severity:  Normal                   |   Keywords:
Actual Points:                           |  Parent ID:
       Points:                           |   Reviewer:
      Sponsor:                           |
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 Mike asked me a while ago to make a graph showing what fraction of network
 capacity is spent on directory traffic as an easy way to measure directory
 overhead.  The idea was that this graph should trend down as we make
 directory fetches more efficient, but that it could trend up if we add a
 bunch of clients that don't do much other than download the consensus.

 We already have two related graphs,
 [https://metrics.torproject.org/bandwidth.html Total relay bandwidth] and
 [https://metrics.torproject.org/dirbytes.html Bandwidth spent on answering
 directory requests], and this new graph would basically combine those two.

 I made a sample graph that I'll attach to this ticket together with the
 code to make that graph.

 Let's use this ticket to discuss whether such a graph would be useful to
 have on Tor Metrics, and if so, let's use it to write a useful description
 and work on a metrics-web patch.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22236>
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