[Wikidata-bugs] [Maniphest] T331405: Query service maxlag calculation should exclude datacenters that don't receive traffic and where the updater is turned off

[Joe]

Joe added a comment.


  Re-thinking about this: what we're really interested in is knowing what is 
the max lag of a server that is receiving user traffic.
  
  So I crafted the following metric in prometheus:
  
  `max(time() - blazegraph_lastupdated and 
rate(blazegraph_queries_done_total{}[5m]) > 10)`
  
  This gives us the maximum lag for servers that are receiving a significant 
amount of traffic.
  
  I added a graph showing off this max lag calculation here: 
https://grafana.wikimedia.org/d/000000489/wikidata-query-service?orgId=1&refresh=1m&from=now-24h&to=now&var-cluster_name=wdqs&viewPanel=41

TASK DETAIL
  https://phabricator.wikimedia.org/T331405

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To: Joe
Cc: Joe, Aklapper, dcausse, Lucas_Werkmeister_WMDE, Astuthiodit_1, AWesterinen, 
Arnoldokoth, karapayneWMDE, Invadibot, MPhamWMF, maantietaja, wkandek, 
JMeybohm, CBogen, ItamarWMDE, Akuckartz, Nandana, Namenlos314, jijiki, Lahi, 
Gq86, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, 
rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, 
Tobias1984, Manybubbles, Mbch331

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