| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Jim Nasby <jim(at)nasby(dot)net>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Peter Geoghegan <peter(at)2ndquadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [PERFORM] encouraging index-only scans |
| Date: | 2014-02-11 17:54:10 |
| Message-ID: | 20140211175410.GF31598@awork2.anarazel.de |
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| Lists: | pgsql-hackers pgsql-performance |
On 2014-02-11 12:12:13 -0500, Bruce Momjian wrote:
> Yes, that pretty much sums it up. We introduced index-only scans in 9.2
> (2012) but they still seem to be not usable for insert-only workloads
> two years later. Based on current progress, it doesn't look like this
> will be corrected until 9.5 (2015). I am kind of confused why this has
> not generated more urgency.
I think this largely FUD. They are hugely beneficial in some scenarios
and less so in others. Just like lots of other features we have.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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