| From: | John Naylor <jcnaylor(at)gmail(dot)com> |
|---|---|
| To: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: MCV lists for highly skewed distributions |
| Date: | 2018-01-07 11:07:06 |
| Message-ID: | CAJVSVGUMfhCo5feCS+fPzfwhNAi79tcEzHcw+cYmuOaVak=JFw@mail.gmail.com |
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| Lists: | pgsql-hackers |
I wrote:
> I'll be travelling for a few days, but I'll do some testing on some
> data sets soon.
I've attached some preliminary test methods and results. Probably not
detailed or rigorous enough, but I wanted to share this much before
digging deeper. I created some test data, ran analyze a few times and
eyeballed the results, of which I give a typical example. I used a low
stat target to make it easier to see the general picture. Suggestions
welcome.
-John Naylor
| Attachment | Content-Type | Size |
|---|---|---|
| test_analyze_highly_skewed_v1.sql | application/sql | 2.4 KB |
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