Thread

Re: Vectorize pg_visibility.pg_visibility_map_summary

Masahiko Sawada <sawada.mshk@gmail.com> — 2025-12-23T19:40:35Z

On Mon, Dec 22, 2025 at 8:03 PM wenhui qiu <qiuwenhuifx@gmail.com> wrote:
>
> Hi
>
> > It looks like a reasonable idea as it also simplifies the
> > pg_visibility_map_summary() function. I'm going to push it, barring
> > any objections.
> Obviously no objections, Using visibilitymap_count() simplifies the code and improves performance, with no behavior change.
>
> Thanks
>
>
> On Tue, Dec 23, 2025 at 6:17 AM Matthias van de Meent <boekewurm+postgres@gmail.com> wrote:
>>
>> Hi,
>>
>> On Mon, 22 Dec 2025 at 23:04, Masahiko Sawada <sawada.mshk@gmail.com> wrote:
>> > On Mon, Dec 22, 2025 at 1:28 PM Matthias van de Meent
>> > <boekewurm+postgres@gmail.com> wrote:
>> > > Here's one small patch that makes it use the visibilitymap_count() API
>> > > for pg_visibility_map_summary(), replacing its own bespoke counting
>> > > mechanism with the primary implementation that has vectorized
>> > > optimizations, thus reducing the overhead of
>> > > pg_visibility_map_summary.
>> > >
>> >
>> > It looks like a reasonable idea as it also simplifies the
>> > pg_visibility_map_summary() function. I'm going to push it, barring
>> > any objections.
>>
>> Obviously no objections from me, and, thanks!
>>

Pushed.

Regards,

-- 
Masahiko Sawada
Amazon Web Services: https://aws.amazon.com