Re: [HACKERS] Parallel bitmap heap scan

On Tue, Mar 7, 2017 at 10:07 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> It's not about speed.  It's about not forgetting to prefetch.  Suppose
> that worker 1 becomes the prefetch worker but then doesn't return to
> the Bitmap Heap Scan node for a long time because it's busy in some
> other part of the plan tree.  Now you just stop prefetching; that's
> bad.  You want prefetching to continue regardless of which workers are
> busy doing what; as long as SOME worker is executing the parallel
> bitmap heap scan, prefetching should continue as needed.

Right, I missed this part. I will fix this.


-- 
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com