Re: Huge performance penalty with parallel queries in Windows x64 v. Linux x64

[Thomas Munro <thomas.munro@xxxxxxxxx>]

On Tue, May 4, 2021 at 4:05 AM Hans Buschmann <buschmann@xxxxxxxxx> wrote:
> The main difference is the time shown for the Gather Merge step (65 ms vs. 7 ms)

No Windows here, but could it be super slow at launching workers?  How
does a trivial parallel query compare, something like?

SET force_parallel_mode = on;
EXPLAIN ANALYZE SELECT 42;