[GitHub] [incubator-superset] graceguo-supercat opened a new issue #7807: [Tagging] Save_as dashboard is very slow because of tagged_objects updates in DB

[GitBox <gi...@apache.org>]

graceguo-supercat opened a new issue #7807: [Tagging] Save_as dashboard is very slow because of tagged_objects updates in DB
URL: https://github.com/apache/incubator-superset/issues/7807
 
 
   In airbnb we have around 9000 dashboards and over 100,000 slices.
   
   ### Expected results
   
   When user save_as a copy of a dashboard, the action should finish in a couple of seconds.
   
   ### Actual results
   
   It took user 90 seconds to save_as a dashboard with 90 slices.
   
   #### Screenshots
   
   When calling /copy_dash API, I found following db operation is very slow:
   `SELECT tagged_object.id AS tagged_object_id 
   FROM tagged_object INNER JOIN tag ON tag.id = tagged_object.tag_id 
   WHERE tagged_object.object_type = 'chart' AND tagged_object.object_id = 150283 AND tag.type = 'owner' `
   
   
   #### How to reproduce the bug
   
   1. Create a large dashboard
   2. Click `Save as` button from dashboard header dropdown menu
   3. Choose `Save as`
   
   ### Environment
   
   (please complete the following information):
   
   - superset version: lastest 
   - python version: Python 3.6.1
   - node.js version: v10.15.3
   - npm version: 6.4.1
   
   ### Checklist
   
   Make sure these boxes are checked before submitting your issue - thank you!
   
   - [x] I have checked the superset logs for python stacktraces and included it here as text if there are any.
   - [x] I have reproduced the issue with at least the latest released version of superset.
   - [x] I have checked the issue tracker for the same issue and I haven't found one similar.
   
   ### Additional context
   
   Add any other context about the problem here.
   

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