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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Thomas Munro <thomas.munro@gmail.com>
Cc: Peter Geoghegan <pg@bowt.ie>
Cc: Andres Freund <andres@anarazel.de>
Cc: Masahiko Sawada <sawada.mshk@gmail.com>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: Michael Paquier <michael@paquier.xyz>
Cc: Anastasia Lubennikova <lubennikovaav@gmail.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Subject: Re: A test for replay of regression tests
Date: Mon, 04 Apr 2022 12:39:59 -0400
Message-ID: <1916714.1649090399@sss.pgh.pa.us> (raw)
In-Reply-To: <1258185.1648876239@sss.pgh.pa.us>
References: <CA+hUKG+Bncrfh0piJ83HUZ4cG+58TikGXwDux4sj7jvoMc=eNg@mail.gmail.com>
	<CA+hUKGK-q9utvxorA8sCwF3S4SzBmxxDgneP4rLqeHWdZxM4Gg@mail.gmail.com>
	<CA+hUKGLsrWbiCcMxBLRBAP6Z=ykFRHWzdmP9YKujSKoSnEJECQ@mail.gmail.com>
	<b10198e2-7411-7946-dfaa-3c8c5525d5c9@dunslane.net>
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	<CAD21AoCNoWjYkdEtr+VDoF9v__V905AedKZ9iF=ArgCtrbxZqw@mail.gmail.com>
	<CA+hUKGKRtpz3qAg7=Yne_oJ8ZdeiT3JbPPCayjgHFgrKUeKViQ@mail.gmail.com>
	<CAH2-Wzk3RYzqdaOs5PUqoUjd=_LbWc7zdDzV6rR6D3kM3C=fNg@mail.gmail.com>
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	<CAH2-Wzm_mXH2mxn150tPmh1_kjQ9eC2dKdEr=UtHVOjnS2x3Sg@mail.gmail.com>
	<20220325041607.3vcnw34wxoucb5zy@alap3.anarazel.de>
	<CAH2-WznxZDjHaxYk2u_wpJysQGBLiVxCa550Ja7xxHm-+eTVNw@mail.gmail.com>
	<CA+hUKGLV3wzmYFbNs+TZ1+w0e=hc61fcvrF3OmutuaPBuZMd0w@mail.gmail.com>
	<1258185.1648876239@sss.pgh.pa.us>

I wrote:
> I think the fundamental instability here is that this TAP test is
> setting shared_buffers small enough to allow the syncscan logic
> to kick in where it does not in normal testing.  Maybe we should
> just disable syncscan in this test script?

Did that, we'll see how much it helps.

			regards, tom lane





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