On Tue, May 21, 2019 at 11:16 AM Walter Smith <walter@xxxxxxxxxxxx> wrote: > It occurs to me that is a somewhat unusual index -- it tracks unprocessed notifications so it gets an insert and delete for 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
