On 15 July 2016 at 20:54, <amatv...@bitec.ru> wrote:

> Hi
> > but parallel processing doesn't requires threading support - see
> PostgreSQL 9.6 features.
> To   share  dynamic  execution  code between threads much more easy(If
> sharing this code between process is possible).
> There  is  many  other  interaction techniques  between threads which is
> absence between process.

We have shared memory.

How do you think the buffer cache works?

Lots more could be shared, too. Cached plans, for example.

It's possible. You just have to change how you think about it, and you
might not be able to do it within the framework of the JVM. So it's quite
possibly not worth it for you. Nonetheless, don't assume it can't be done
just because you can't do it the way you're used to thinking of doing it.

 Craig Ringer                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

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