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From: Michael Banck <[email protected]>
To: Wasim Devale <[email protected]>
Cc: Pgsql-admin <[email protected]>
Cc: pgsql-admin <[email protected]>
Subject: Re: data_checksums = off
Date: Mon, 9 Sep 2024 10:59:20 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAB5fag7fm34nqYLjPdQcGn=V_SApwZVnXv-gU=XWY9_7aKLLxA@mail.gmail.com>
References: <CAB5fag7fm34nqYLjPdQcGn=V_SApwZVnXv-gU=XWY9_7aKLLxA@mail.gmail.com>

Hi,

On Mon, Sep 09, 2024 at 02:24:04PM +0530, Wasim Devale wrote:
> The data_checksums option is off in pg_settings and it is a preset option
> to do while doing initialisation of data directory. I can not use alter
> command any solutions to it?

You need to shut down the instance and then run
pg_checksums --enable -D <data directory>

Checksums cannot be enabled while the instance is online and the above
needs to rewrite every block so it can take a while on larger instances.


Michael

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