Knowledge Drop

What is included in "Runtime" in System Activity?

Last tested: May 11, 2020


The Question:

System Activity users who are trying to assess query performance will often ask things like:

  • What is included in query runtime?
  • How come the query runtime doesn't match the runtime in my database?


Query runtime is the time Looker spends from when the query is asked to when it is returned:

  • Sending the query to the DB
  • Waiting for a result from the DB
  • Receiving the result from the DB and writing the JSON for the visualization to render


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