Hi,
Browsing the PostgreSQL 12 release notes I noticed that JIT is
now
enabled by default. Having not followed PostgreSQL development
closely -
does this mean that compilation results are now getting cached
and
compilation is no longer executed separately for each worker
thread in a
parallel query ?
I don't know, but just want to chime in with my experience
with PG-12 and JIT: Execution-time is still way worse then
JIT=off for your queries so we'll turn JIT=off until we can
mesure performance-gain.
Hm, that's a bummer. So I guess we'll also have to make sure JIT
is turned off when upgrading.
Thanks,
Tobias
