| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Peter Geoghegan <pg(at)bowt(dot)ie>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: pgsql: Compute XID horizon for page level index vacuum on primary. |
| Date: | 2019-05-01 17:10:40 |
| Message-ID: | CA+TgmoYX_NpujURawaV-UH6HLSCsdjEw8-qxQ_DKM22BNRqYZw@mail.gmail.com |
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On Wed, May 1, 2019 at 12:50 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > Not strongly enough to argue about it very hard. The current behavior
> > is a little weird, but it's a long way from being the weirdest thing
> > we ship, and it appears that we have no tangible evidence that it
> > causes a problem in practice.
>
> I think there's nothing that fails to suck about a hardwired "+ 10".
It avoids a performance regression without adding another GUC.
That may not be enough reason to keep it like that, but it is one
thing that does fail to suck.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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