| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, Peter Geoghegan <pg(at)bowt(dot)ie> |
| Subject: | Re: allow segment size to be set to < 1GiB |
| Date: | 2022-11-08 02:29:12 |
| Message-ID: | 20221108022912.f2j7e4y3nylruusj@awork3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2022-11-07 12:52:25 -0500, Tom Lane wrote:
> Andres Freund <andres(at)anarazel(dot)de> writes:
> > In the attached patch I renamed --with-segsize= to --with-segsize-mb= /
> > -Dsegsize= to -Dsegsize_mb=, to avoid somebody building with --with-segsize=2
> > or such suddenly ending up with an incompatible build.
>
> For the purpose of exercising these code paths with the standard
> regression tests, even a megabyte seems large -- we don't create
> very many test tables that are that big.
Good point.
> How about instead allowing the segment size to be set in pages?
In addition or instead of --with-segsize/-Dsegsize? Just offering the number
of pages seems like a not great UI.
I guess we could add support for units or such? But that seems messy as well.
Greetings,
Andres Freund
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