| From: | Ajin Cherian <itsajin(at)gmail(dot)com> |
|---|---|
| To: | "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com> |
| Cc: | Peter Smith <smithpb2250(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Proposal: Filter irrelevant change before reassemble transactions during logical decoding |
| Date: | 2025-03-13 02:13:00 |
| Message-ID: | CAFPTHDbnc1B6XGrnQEvuG-psxO_T8yJwMwjniLBAK-N-SZHmnA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Mar 3, 2025 at 9:10 PM Ajin Cherian <itsajin(at)gmail(dot)com> wrote:
>
> On Thu, Feb 20, 2025 at 8:42 PM Hayato Kuroda (Fujitsu)
> <kuroda(dot)hayato(at)fujitsu(dot)com> wrote:
> >
I confirmed with tests that with the patch, a lot less disk space is
used when there are lots of unpublished changes and the subscription
is not configured to be streaming.
HEAD code:
Initial disk usage in replication slot directory:
4.0K /home/ajin/dataoss/pg_replslot/mysub
BEGIN
INSERT 0 1000000
COMMIT
Final disk usage in replication slot directory:
212M /home/ajin/dataoss/pg_replslot/mysub
Patched code:
Initial disk usage in replication slot directory:
4.0K /home/ajin/dataoss/pg_replslot/mysub
BEGIN
INSERT 0 1000000
COMMIT
Final disk usage in replication slot directory:
4.0K /home/ajin/dataoss/pg_replslot/mysub
Attaching the test script used.
Regards,
Ajin Cherian
Fujitsu Australia
| Attachment | Content-Type | Size |
|---|---|---|
| test_disk_usage.sh | application/octet-stream | 2.1 KB |
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