Re: Sv: JIT in PostgreSQL 12 ?

Hi,
> På onsdag 29. mai 2019 kl. 10:02:50, skrev Tobias Gierke 
> <[email protected] <mailto:[email protected]>>:
>
>     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