| From: | Andreas Karlsson <andreas(at)proxel(dot)se> |
|---|---|
| To: | Tobias Gierke <tobias(dot)gierke(at)code-sourcery(dot)de>, PostgreSQL mailing lists <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: JIT in PostgreSQL 12 ? |
| Date: | 2019-05-29 09:37:04 |
| Message-ID: | 22e1991e-65cb-4498-eff5-90c13a6a7a99@proxel.se |
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| Lists: | pgsql-performance |
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
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