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From: Tom Lane <[email protected]>
To: Nathan Bossart <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: Andres Freund <[email protected]>
Cc: Julien Rouhaud <[email protected]>
Cc: Michael Paquier <[email protected]>
Cc: Bossart, Nathan <[email protected]>
Cc: Fujii Masao <[email protected]>
Cc: [email protected] <[email protected]>
Cc: Bharath Rupireddy <[email protected]>
Cc: Greg Sabino Mullane <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: make MaxBackends available in _PG_init
Date: Tue, 12 Apr 2022 17:46:36 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <20220412210745.GB2065815@nathanxps13>
References: <CA+TgmoZVQznhWpUr-bjC9U=Won8ZnfozSkiXrW2HU80r6QyASQ@mail.gmail.com>
	<20220411204442.GA2004824@nathanxps13>
	<20220411211435.GA2057981@nathanxps13>
	<[email protected]>
	<20220412180306.GA2063516@nathanxps13>
	<CA+TgmoY4og1VADa78VySwsTjtTQbtXbnRPSq9x=e6ogS_wWfaw@mail.gmail.com>
	<[email protected]>
	<CA+TgmoZM7=VoAey4rf+sZEKFpGDWhqEqk_MHoBPXkYbAONGcyQ@mail.gmail.com>
	<20220412195908.GA2064996@nathanxps13>
	<[email protected]>
	<20220412210745.GB2065815@nathanxps13>

Nathan Bossart <[email protected]> writes:
> If we allow changing GUCs in _PG_init() and provide another hook where
> MaxBackends will be initialized, do we need to introduce another GUC flag,
> or can we get away with just blocking all GUC changes when the new hook is
> called?  I'm slightly hesitant to add a GUC flag that will need to manually
> maintained.  Wouldn't it be easily forgotten?

On the whole I think Robert's got the right idea: we do not really
need an enforcement mechanism at all.  People who are writing
extensions that do this sort of thing will learn how to do it right.
(It's not like there's not a thousand other things they have to get
right.)

			regards, tom lane

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  Subject: Re: make MaxBackends available in _PG_init
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