Hi, On 2020-09-25 19:05:52 +0200, Christoph Berg wrote: > Am 25. September 2020 18:42:04 MESZ schrieb Andres Freund <and...@anarazel.de> > >> * jit is not exercised enough by "make installcheck" > > > >So far we've exercised more widely it by setting up machines that use > >it > >for all queries (by setting the config option). I'm doubtful it's worth > >doing differently. > > Ok, but given that Debian is currently targeting 22 architectures, I > doubt the PostgreSQL buildfarm covers all of them with the extra JIT > option, so I should probably make sure to do that here when running > tests.
Forcing to JIT a lot of queries that are otherwise really fast unfortunately has a significant time cost. Doing that on slow architectures might be prohibitively slow. Kinda wonder if we shouldn't just restrict JIT to a few architectures that we have a bit more regular access to (x86, arm, maybe also ppc?). It's not like anybody would run large analytics queries on mips. Greetings, Andres Freund
