On Tue, May 21, 2019 at 11:16 AM Walter Smith <walter@carezone.com> wrote:
> It occurs to me that is a somewhat unusual index -- it tracks unprocessed notifications so it gets an insert and
deletefor every row, and is normally almost empty.
Is it a very low cardinality index? In other words, is the total
number of distinct keys rather low? Not just at any given time, but
over time?
--
Peter Geoghegan
