To test: Go to a big site and find a view with some tags on it - make a note of the view id and plug that into the SQL above in place of the '123'
Run that 'explain ...' sql and make a note of the "Planning time" and "Execution time" - run it a few time to get an average Then add the unique index ALTER TABLE tag ADD CONSTRAINT tag_unique UNIQUE (tag, resourcetype, resourceid, ownertype, ownerid); Run that 'explain ...' sql and make a note of the "Planning time" and "Execution time" - run it a few time to get an average It should be way faster Then drop the index so you can add it back with upgrade of the site ALTER TABLE tag DROP CONSTRAINT tag_unique; -- You received this bug notification because you are a member of Mahara Contributors, which is subscribed to Mahara. Matching subscriptions: Subscription for all Mahara Contributors -- please ask on #mahara-dev or mahara.org forum before editing or unsubscribing it! https://bugs.launchpad.net/bugs/1889340 Title: Adding indexes to tag table to speed things up Status in Mahara: Confirmed Status in Mahara 19.04 series: Confirmed Status in Mahara 19.10 series: Confirmed Status in Mahara 20.04 series: Confirmed Status in Mahara 20.10 series: Confirmed Bug description: To make requests to tags table faster To manage notifications about this bug go to: https://bugs.launchpad.net/mahara/+bug/1889340/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~mahara-contributors Post to : [email protected] Unsubscribe : https://launchpad.net/~mahara-contributors More help : https://help.launchpad.net/ListHelp
