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From: Daniel Gustafsson <[email protected]>
To: Christophe Pettus <[email protected]>
Cc: bruno vieira da silva <[email protected]>
Cc: [email protected]
Subject: Re: data checksums
Date: Wed, 7 Aug 2024 09:41:18 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <CAB+Nuk8y88kvoRHsfN2Pjed9o_iM+9FbveU=4P8G0EQbzFP+qw@mail.gmail.com>
	<[email protected]>

> On 6 Aug 2024, at 18:29, Christophe Pettus <[email protected]> wrote:
>> On Aug 6, 2024, at 08:11, bruno vieira da silva <[email protected]> wrote:

>> the pg doc 
>> mentions a considerable performance penality, how considerable it is?
> 
> That line is probably somewhat out of date at this point.  We haven't seen a significant slowdown in enabling them on any modern hardware.  I always turn them on, except on the type of filesystems/hardware mentioned above.

The last in-depth analysis of data checksums (and hint bits) overhead that I
can remember is from 2019:

  https://www.postgresql.org/message-id/20190330192543.GH4719%40development

Hardware advances in the last five years may very well have made these findings
irrelevant however.

--
Daniel Gustafsson

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