On Mon, Dec 9, 2019 at 1:00 PM Jeremy Finzel <finz...@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?

Cheers,

Jeff

>

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