On Tue, Mar 7, 2017 at 6:26 PM, Pat Maddox <p...@adorable.io> wrote: > Hi there, > > I’ve been asked to help with a project dealing with slow queries. I’m > brand new to the project, so I have very little context. I’ve gathered as > much information as I can. > > I’ve put the schema, query, and explain info in gists to maintain their > formatting. > > We are stumped with this slow query right now. I could really use some > help looking for ways to speed it up. > > If you need any more information, please let me know. >
You could try a partial index on: (account_id, completed_at desc, taskable_name, position, assigned_to_user_id) where "tasks"."archived" != 't' AND "tasks"."complete" = 't' Also, the poor estimate of the number of rows on your scan of index_permissions_on_user_id_and_object_id_and_object_type suggests that you are not analyzing (and so probably also not vacuuming) often enough. Cheers, Jeff
