Re: Parallel bitmap heap scan

On Mon, Oct 17, 2016 at 1:23 AM, Dilip Kumar <dilipbalaut@gmail.com> wrote:
> There is major chance in tidbitmap.c file after efficient hash table
> commit [1] and my patch need to be rebased.
>
> Only parallel-bitmap-heap-scan need to be rebased, all other patch can
> be applied on head as is.
> Rebased version (v2) of parallel-bitmap-heap-scan is attached.

But what's the impact on performance?  Presumably parallel bitmap heap
scan was already slower than the non-parallel version, and that commit
presumably widens the gap.  Seems like something to worry about...

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company