On Wed, Oct 31, 2018 at 2:11 PM Tom Lane <t...@sss.pgh.pa.us> wrote: > =?UTF-8?Q?Darafei_=22Kom=D1=8Fpa=22_Praliaskouski?= <m...@komzpa.net> > writes: > > Question is, what's the best policy to allocate cores so we can play nice > > with rest of postgres? >
> There is not, because we do not use or support multiple threads inside > a Postgres backend, and have no intention of doing so any time soon. > As a practical matter though, if we're multi-threading a heavy PostGIS function, presumably simply grabbing *every* core is not a recommended or friendly practice. My finger-in-the-wind guess would be that the value of max_parallel_workers_per_gather would be the most reasonable value to use to limit the number of cores a parallel PostGIS function should use. Does that make sense? P
