| From: | Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | John Naylor <jcnaylor(at)gmail(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: MCV lists for highly skewed distributions |
| Date: | 2018-02-07 15:58:14 |
| Message-ID: | CAEZATCUCXmKvG9tkkKL1H5TMUB3kfLs7WE+uRizm9=U3E1qGFw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 7 February 2018 at 15:25, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> Do you plan to press forward with this, then, or what's
> the next step?
>
Yes, I think the results are pretty good so far, especially for the
more non-uniform distributions. AFAICS it solves the 2 original
complaints, and I've not yet seen a case where it makes things worse.
I plan to do more testing (and if anyone else wants to, that would be
most welcome), and then barring any unexpected issues/objections, I'll
commit it. Probably not this week though.
Regards,
Dean
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