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From: Frédéric Yhuel <[email protected]>
To: Dimitrios Apostolou <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Christophe Courtois <[email protected]>
Subject: Re: ALTER TABLE ADD FOREIGN KEY to partitioned table, is not parallelized
Date: Thu, 5 Jun 2025 16:13:54 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
	<[email protected]>
	<[email protected]>



On 6/4/25 16:12, Dimitrios Apostolou wrote:
> In general I have noticed most operations are slower after a succesful 
> pg_restore until VACUUM is complete, which is unfortunate as the 
> database is huge and it takes days to run. Something I have on my list 
> to try, is whether a COPY FREEZE would alleviate all this trouble, since 
> all tuples are immediately visible then. Maybe a patch for a new 
> pg_restore option --freeze is a better solution. Are my assumptions right?

It seems that the idea has already been discussed: 
https://www.postgresql.org/message-id/flat/CA%2BU5nM%2BXvkUu9ran%2B5cY%3DTWQquLTpvzte4KVMK%3DaDfbr-x...

I've CCed Bruce Mojman, in the hope that he can tell us more about it.

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