Hi,
On 2020-09-25 19:05:52 +0200, Christoph Berg wrote:
> Am 25. September 2020 18:42:04 MESZ schrieb Andres Freund <andres@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
