3 Replies Latest reply on Jul 24, 2013 7:23 AM by Toby Erkson

    Improving tableau performance

    Saken Kulkarni

      Hi Tableau Experts,


      Quick question for you. I have a dashboard that has an extract of over 300 fields, but only 100 of them are being used.


      I have a hypothesis that removing those 200 unused fields from the extract will improve performance. But, I want to specifically understand why.


      Can someone test my logic? I am assuming that all fields are pulled from the database into the extract using a select * type statement (both used and unused) and refreshed according to the pre-defined refresh schedule.


      Is there a distinction between those fields that are used in the dashboards and those that are not, from a performance perspective? My hyopthesis is yes, but I can't totally explain why.


      Any help will be appreciated.