On Mon, Nov 04, 2019 at 03:04:45AM +0000, David Wheeler wrote: > Postgres version 9.5.19 > Each of the tables has between 3-4 indexes, and all the indexes include tid > as first parameter.
On Mon, Nov 04, 2019 at 12:00:59AM -0500, Tom Lane wrote: > If this *is* the cause, v11 and up have a performance improvement that > you need: But note that index definition will be prohibited since: https://www.postgresql.org/docs/9.6/release-9-6.html |Disallow creation of indexes on system columns, except for OID columns (David Rowley) |Such indexes were never considered supported, and would very possibly misbehave since the system might change the system-column fields of a tuple without updating indexes. However, previously there were no error checks to prevent them from being created. Justin
