Bruno Wolff III <bruno@xxxxxxxx> writes: > While reloading a database cluster to move from 10.5 to 11, I'm getting > out of memory crashes that I did see when doing reloads on pg 10. > The statement flagged in the log is this: > 2018-10-23 16:44:34.815 CDT [126839] STATEMENT: ALTER TABLE ONLY public.iplocation > ADD CONSTRAINT overlap EXCLUDE USING spgist (network WITH &&); Hm, there's a fair amount of new code in SP-GIST in v11, so maybe you've hit a memory leak in that. Can you create a self-contained test case? regards, tom lane