[tor-bugs] #8127 [Metrics Website]: Fix and re-enable relays-by-country graph on metrics website

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#8127: Fix and re-enable relays-by-country graph on metrics website
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 Reporter:  karsten          |          Owner:  karsten
     Type:  defect           |         Status:  new    
 Priority:  minor            |      Milestone:         
Component:  Metrics Website  |        Version:         
 Keywords:                   |         Parent:         
   Points:                   |   Actualpoints:         
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 Aggregating data for the
 [https://metrics.torproject.org/network.html#relaycountries relays-by-
 country graph] has become prohibitively expensive.  It keeps the server
 busy for 2 hours every day, affecting more important tasks like
 downloading descriptors.  That's why I disabled this aggregation step on
 February 1 to the effect that relays-by-country graphs are still available
 but won't receive new data.  The problem is the PostgreSQL-based IP-to-
 country lookup.  I should look into making this lookup much, much faster.
 Creating this ticket so I don't forget.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8127>
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