Re: Regarding fillfactor use case for only delete ops

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From: Durgamahesh Manne <[email protected]>
To: Ron Johnson <[email protected]>
Cc: Laurenz Albe <[email protected]>
Cc: pgsql-general <[email protected]>
Subject: Re: Regarding fillfactor use case for only delete ops
Date: Sat, 7 Jun 2025 04:34:21 +0530
Message-ID: <CAJCZkoKiRAjeCZKdEtZq054kdk0RpGF50gqwh7msLdogo5JOAw@mail.gmail.com> (raw)
In-Reply-To: <CANzqJaB8aRCuEYYDU_qK0WUVVdWdoCte=wDt5387uj=Ncw5_Pg@mail.gmail.com>
References: <CAJCZkoLkMLsz1raz+XLJ09PUdgWv7mw37+zaFw9jNMhFUC+SVg@mail.gmail.com>
	<[email protected]>
	<CANzqJaB8aRCuEYYDU_qK0WUVVdWdoCte=wDt5387uj=Ncw5_Pg@mail.gmail.com>

On Fri, Jun 6, 2025 at 7:29 PM Ron Johnson <[email protected]> wrote:

> On Fri, Jun 6, 2025 at 8:57 AM Laurenz Albe <[email protected]>
> wrote:
>
>> On Fri, 2025-06-06 at 14:10 +0530, Durgamahesh Manne wrote:
>> > Can we generate a fill factor for tables that have delete ops ?
>> >
>> > Does the fill factor really work and help to minimize the bloat for
>> tables that have delete ops?
>> >
>> > I have parent table with weekly partitions So for every week 50 to 60
>> gb of bloat generates and autovacuum params already in place for child
>> tables
>>
>> Nothing can ever avoid bloat caused by DELETE, except partitioning in a
>> way that you can drop a partition rather than running DELETE.
>>
>>
> Laurenz,
>
> Isn't the fill factor aimed at reducing bloat during updates of HOT tables?
>
> --
> Death to <Redacted>, and butter sauce.
> Don't boil me, I'm still alive.
> <Redacted> lobster!
>


Hi

I believe that fill factor works exclusively for updates of HOT tables  but
not for delete ops

Regards,
Durga Mahesh

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