Hi, On 2020-02-24 12:16:08 +0530, Aditya Toshniwal wrote: > The PG 12.2 server is crashing on setting the jit_above_cost param. Below > is the output. > postgres=# SELECT count(*) FROM pg_class; > > server closed the connection unexpectedly > > This probably means the server terminated abnormally > > before or while processing the request. > > The connection to the server was lost. Attempting reset: Failed. This isn't reproducible here. Are you sure that you're running on a clean installation? If not, we'd at least need a backtrace to figure out what's going on. Greetings, Andres Freund