| From: | David Steele <david(at)pgmasters(dot)net> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com>, Mark Dilger <hornschnorter(at)gmail(dot)com> |
| Cc: | David Fetter <david(at)fetter(dot)org>, PostgreSQL Development <pgsql-hackers(at)postgresql(dot)org>, Christophe Pettus <xof(at)thebuild(dot)com> |
| Subject: | Re: Make autovacuum sort tables in descending order of xid_age |
| Date: | 2020-03-30 14:09:33 |
| Message-ID: | 2e45935a-d492-2b19-a2c4-991e1efe0895@pgmasters.net |
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| Thread: | |
| Lists: | pgsql-hackers |
On 1/11/20 12:53 PM, David Fetter wrote:
>
> I agree that it's a complex situation, and that many different
> approaches will eventually need to be brought to bear.
>
> What concerns me about introducing a big lump of complexity here is
> disentangling the effects of each part and of their interaction terms.
> We're not, to put it mildly, set up to do ANOVA
> (https://en.wikipedia.org/wiki/Analysis_of_variance ) , ANCOVA (
> https://en.wikipedia.org/wiki/Analysis_of_covariance ), etc. on
> changes.
>
> Given the above, I'd like to make the case for changing just this one
> thing at first and seeing whether the difference it makes is generally
> positive.
Mark, Robert, thoughts on this?
--
-David
david(at)pgmasters(dot)net
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