[tor-bugs] #16997 [Tor]: Gather and report metrics for the number of channels a relay is servicing.

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#16997: Gather and report metrics for the number of channels a relay is servicing.
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 Reporter:  yawning            |          Owner:
     Type:  enhancement        |         Status:  new
 Priority:  normal             |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor                |        Version:  Tor: unspecified
 Keywords:  tor-core, metrics  |  Actual Points:
Parent ID:                     |         Points:
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 It would be really nice to have statistics on the min/max/average number
 of simultaneous channels (TCP/IP connections) a relay is servicing for a
 few reasons:

  * If we are to add per-channel padding like in #16861 (or something more
 aggressive like people discuss), we need this to figure out how much extra
 bandwidth a relay will use, and possibly for parameter tuning.
  * This information will be helpful in determining if someone can/should
 run a relay, given their environment (Eg: To figure out if their relay
 will end up underutilized/bad for the network due to NAT connection
 table/OS limitations).

 I'm uncertain as to how coarse grained this will need to be, particularly
 for Guards. Bridges **SHOULD NOT** report this information.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16997>
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