| From: | "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com> |
|---|---|
| To: | 'Robert Haas' <robertmhaas(at)gmail(dot)com> |
| Cc: | Paul A Jungwirth <pj(at)illuminatedcomputing(dot)com>, Mutaamba Maasha <maasha(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, "Zhijie Hou (Fujitsu)" <houzj(dot)fnst(at)fujitsu(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bertrand Drouvot <bertranddrouvot(dot)pg(at)gmail(dot)com>, "pgsql-hackers(at)lists(dot)postgresql(dot)org" <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | RE: ReplicationSlotRelease() crashes when the instance is in the single user mode |
| Date: | 2025-08-18 08:53:05 |
| Message-ID: | OSCPR01MB149662AF405B02C163E02B376F531A@OSCPR01MB14966.jpnprd01.prod.outlook.com |
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| Lists: | pgsql-hackers |
Dear Robert,
> The use case for single-user mode is quite limited in general, but
> most things work in single-user mode unless they are something that
> intrinsically can't. For example, parallel query cannot be used in
> single-user mode, because there is only one process. Replication
> cannot work, for the same reason. But manual slot operations can work,
> so I do not think it is good to arbitrarily prohibit them. We do not
> need a reason to specifically allow them; it is enough that there is
> no good reason for them to be blocked.
Thanks for the confirmation. Till now, it is mostly fifty-fifty in the community
whether we should allow the manipulation in the single-user mode.
I did split a patch to fix the initial issue [1]. Let's focus on the 0001 patch
firstly.
Best regards,
Hayato Kuroda
FUJITSU LIMITED
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