> On Jun 29, 2021, at 10:33 AM, Ron <ronljohnsonjr@xxxxxxxxx> wrote: > > Prod is brand new. Loaded on Saturday; we saw this problem on Sunday during pre-acceptance. Thus, while running ANALYZE was top of the list of Things To Do, running VACUUM was low. > > Is that a mistaken belief? You might want to run VACUUM FREEZE and then retry your test query using EXPLAIN. See if it switches to an index only scan after the VACUUM FREEZE. — Mark Dilger EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company