Re: MVCC and all that...

From: Ron Johnson <ronljohnsonjr(at)gmail(dot)com>
To: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: Re: MVCC and all that...
Date: 2025-09-10 15:11:30
Message-ID: CANzqJaBMExaKVMnMWBDxR=iYcm=ofjpJp6KWkSXijhDU2g8NNg@mail.gmail.com
Views: Whole Thread | Raw Message | Download mbox | Resend email
Thread:
Lists: pgsql-general

On Wed, Sep 10, 2025 at 11:08 AM Ellen Allhatatlan <
ellenallhatatlan(at)gmail(dot)com> wrote:
[snip]

> So, you have table X - it has 2M rows (say, 0.5 GB) in the first file
> (along with all the other tables). The 2GB limit is hit, more data is
> added. 0.7 GB is added to table X - these records go into a new
> database file - the table is split in two - you have 2 "extents" of
> 2GB with X split 0.5 - in extent1, 0.7 in extent2. All mixed up with
> other tables as well!
>
> That was the architectural flaw to which I was referring. Nothing to
> do with PG
>

You're gonna be in for a very rude surprise after adding 1GB of data to a
PG table...

--
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!

In response to

Responses

Browse pgsql-general by date

  From Date Subject
Next Message Adrian Klaver 2025-09-10 15:15:35 Re: MVCC and all that...
Previous Message Ellen Allhatatlan 2025-09-10 15:08:15 Re: MVCC and all that...