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* MVCC and all that...
@ 2025-09-09 16:27 Ellen Allhatatlan <[email protected]>
2025-09-09 16:40 ` Re: MVCC and all that... Rob Sargent <[email protected]>
0 siblings, 1 reply; 2+ messages in thread
From: Ellen Allhatatlan @ 2025-09-09 16:27 UTC (permalink / raw)
To: pgsql-general
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!
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: MVCC and all that...
2025-09-09 16:27 MVCC and all that... Ellen Allhatatlan <[email protected]>
@ 2025-09-09 16:40 ` Rob Sargent <[email protected]>
0 siblings, 0 replies; 2+ messages in thread
From: Rob Sargent @ 2025-09-09 16:40 UTC (permalink / raw)
To: Ellen Allhatatlan <[email protected]>; +Cc: pgsql-general
> 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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2025-09-09 16:27 MVCC and all that... Ellen Allhatatlan <[email protected]>
2025-09-09 16:40 ` Rob Sargent <[email protected]>
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