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From: Rob Sargent <[email protected]>
To: Ellen Allhatatlan <[email protected]>
Cc: pgsql-general <[email protected]>
Subject: Re: MVCC and all that...
Date: Tue, 9 Sep 2025 10:40:50 -0600
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAMLfE0MAVH5YORs0OKmD=fFWH9EtuNsnhViti=+hkp3Kbz-Gfw@mail.gmail.com>
References: <CAMLfE0MAVH5YORs0OKmD=fFWH9EtuNsnhViti=+hkp3Kbz-Gfw@mail.gmail.com>



> On Sep 9, 2025, at 10:27 AM, Ellen Allhatatlan <[email protected]> wrote:
> 
> Reading this article
> https://firebirdsql.org/migrating-from-firebird-to-postgresql-what-can-go-wrong-
> I'm a bit confused (not the first time...)
> 
> In part 1. Differences in MVCC implementation - he's saying that "It’s
> not that the PostgreSQL implementation of MVCC is bad — it’s just
> fundamentally different"
> 
> But, I thought Firebird had SWEEP instead of VACUUM (how much closer
> can the words be?) and that FB's implementation of MVCC was
> essentially similar.
> Is this correct? Then why is he pointing out the performance diffs
> because of MVCC? I'm puzzled!
> 
> 
> --
> 
> El!
> 

It is written by someone @firebirdsql.org so one assumes a few grains of salt necessary. 
> 

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