Date: Wed, 22 Sep 2021 12:53:26 +0900
From: Michael Paquier <michael@paquier.xyz>
To: "Bossart, Nathan" <bossartn@amazon.com>
Cc: Justin Pryzby <pryzby@telsasoft.com>,
	Kyotaro Horiguchi <horikyota.ntt@gmail.com>,
	"tgl@sss.pgh.pa.us" <tgl@sss.pgh.pa.us>,
	"robertmhaas@gmail.com" <robertmhaas@gmail.com>,
	"masao.fujii@oss.nttdata.com" <masao.fujii@oss.nttdata.com>,
	"andres@anarazel.de" <andres@anarazel.de>,
	"magnus@hagander.net" <magnus@hagander.net>,
	"mark.dilger@enterprisedb.com" <mark.dilger@enterprisedb.com>,
	"don@seiler.us" <don@seiler.us>,
	"pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>
Subject: Re: Estimating HugePages Requirements?
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On Tue, Sep 21, 2021 at 04:06:38PM +0000, Bossart, Nathan wrote:
> I was looking at this from the standpoint of keeping the startup steps
> consistent between the modes.  Looking again, I can't think of
> a strong reason to add it to bootstrap mode.  I think the case for
> adding it to single-user mode is a bit stronger, as commands like
> "SHOW shared_memory_size;" currently return 0.  I lean in favor of
> adding it for single-user mode, but it's probably fine either way.

I am not sure either as that's a tradeoff between an underestimation
and no information.  The argument of consistency indeed matters.
Let's see if others have any opinion to share on this point.
--
Michael

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