On Mon, Dec 9, 2019 at 1:00 PM Jeremy Finzel <finzelj@gmail.com> wrote:
I have a table with about 7 million records. I had a query in which I needed 2 indexes added, one for a created timestamp field another for an id field; both very high cardinality.
First I noticed the query would not use the timestamp index no matter what session config settings I used. I finally created a temp table copy of the table and verified index is used. Then I rebuilt the main table with VACUUM FULL and this caused the index to be used.
Were they built with CONCURRENTLY? Do you have any long-open snapshots?