| From: | Morris de Oryx <morrisdeoryx(at)gmail(dot)com> |
|---|---|
| To: | Postgres General <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Questions about btree_gin vs btree_gist for low cardinality columns |
| Date: | 2019-06-01 09:02:56 |
| Message-ID: | CAKqnccj6AkjjArRb5eR751sa2eKcf5aRxxWS0i5zORKbyO5fzA@mail.gmail.com |
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| Lists: | pgsql-general |
On Sat, Jun 1, 2019 at 6:24 PM Gavin Flower <GavinFlower(at)archidevsys(dot)co(dot)nz>
wrote:
> On 01/06/2019 14:52, Morris de Oryx wrote:
>
> I'd expect the distribution of values to be closer to a power law than
> the Normal distribution -- at very least a few states would have the
> most lookups. But this is my gut feel, not based on any scientific
> analysis!
G'day and thanks! (I'm in the country to the left of you....) Yeah, and my
mocked data divides things up fairly evenly :(
I meant to mention that when I did my tests that I only had one index on at
a time to prevent confusion. I also ran the speed tests several times so
each was on a warm cache.
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