Re: Parallel Seq Scan - Mailing list pgsql-hackers

I think one thing we could do minimize the chance of such an

error is set the value of parallel workers to be used for plan equal

to max_worker_processes if parallel_seqscan_degree is greater

than max_worker_processes.  Even if we do this, still such an

error can come if user has registered bgworker before we could

start parallel plan execution.