On 5/29/19 10:02 AM, Tobias Gierke wrote:
> 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 ?
No, the compilation still happens once for each worker. PostgreSQL 12
includes some smaller performance improvements for the JIT but nothing
big like that.
Andreas