| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> |
| Cc: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> |
| Subject: | Re: Using POPCNT and other advanced bit manipulation instructions |
| Date: | 2019-02-13 20:59:04 |
| Message-ID: | 20190213205904.GA13925@alvherre.pgsql |
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| Thread: | |
| Lists: | pgsql-hackers |
On 2019-Feb-13, Andrew Gierth wrote:
> >>>>> "Alvaro" == Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:
>
> Alvaro> I've pushed this now. Let's see what the buildfarm has to say
> Alvaro> about it.
>
> Lapwing's latest failure looks like yours rather than mine now? (the
> previous two were mine)
It definitely is ... plans have changed from using IndexOnly scans to
Seqscans, which is likely fallout from the visibilitymap_count() change.
Looking.
(I patched the Makefile to add -mpopcnt to all the compile lines rather
than just the frontend one, but I can't see that explaining the
failure.)
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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