On Mon, May 04, 2020 at 02:12:01PM -0500, Justin Pryzby wrote: > On Mon, May 04, 2020 at 08:07:07PM +0100, Jamie Thompson wrote: > > Additionally, the execution plans for the 10th + following queries look > > fine, they have the same structure as if I run the query manually. It's not > > that the query plan switches, it seems as though the same query plan is > > just > 200X slower than usual. > > Are you able to reproduce the problem manually ? > > With/without PREPARE ? > https://www.postgresql.org/docs/current/sql-prepare.html Also, you should be able to check if that's the problem by doing either: plan_cache_mode = force_generic_plan; Or (I would think) DISCARD PLANS; https://www.postgresql.org/docs/12/runtime-config-query.html -- Justin
