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Fri, 26 Dec 2025 10:17:27 +0000 From: "Ryo Matsumura (Fujitsu)" To: "Aya Iwata (Fujitsu)" , 'Pavel Stehule' , Michael Paquier CC: Peter Smith , Chao Li , "Hayato Kuroda (Fujitsu)" , pgsql-hackers Subject: Re: [PROPOSAL] Termination of Background Workers for ALTER/DROP DATABASE Thread-Topic: [PROPOSAL] Termination of Background Workers for ALTER/DROP DATABASE Thread-Index: Adw0Q6iYueu3o2DFQ0mAqFGMYYi8fgCHrYogAANaoAAADhfaoAAkABYAAAgFebAAHqlkgAAc+sDgABamIwAAB8zgcAAA2L7gAAJh2gAAAJsSIAABnF4AAACrZPAADnLD0AAdyhgAAAccG9AAiEaFAAAGACmAAGU3sZAANwlJgAufFI0AADTJjNAACU7dgABjuTRwAAWSjQAAKB4N0AALRsgAAVn4LyAAK9BaeA== Date: Fri, 26 Dec 2025 10:17:27 +0000 Message-ID: References: In-Reply-To: Accept-Language: ja-JP, en-US Content-Language: ja-JP X-MS-Has-Attach: X-MS-TNEF-Correlator: msip_labels: MSIP_Label_a7295cc1-d279-42ac-ab4d-3b0f4fece050_Enabled=True;MSIP_Label_a7295cc1-d279-42ac-ab4d-3b0f4fece050_SiteId=a19f121d-81e1-4858-a9d8-736e267fd4c7;MSIP_Label_a7295cc1-d279-42ac-ab4d-3b0f4fece050_SetDate=2025-12-26T10:17:27.219Z;MSIP_Label_a7295cc1-d279-42ac-ab4d-3b0f4fece050_Name=FUJITSU-RESTRICTED;MSIP_Label_a7295cc1-d279-42ac-ab4d-3b0f4fece050_ContentBits=1;MSIP_Label_a7295cc1-d279-42ac-ab4d-3b0f4fece050_Method=Standard; 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boundary="_000_TYCPR01MB1131647E781856780072FBAE9E8B0ATYCPR01MB11316jp_" MIME-Version: 1.0 X-OriginatorOrg: fujitsu.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: TYCPR01MB11316.jpnprd01.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7360d33c-2243-49e8-d38a-08de4467f8af X-MS-Exchange-CrossTenant-originalarrivaltime: 26 Dec 2025 10:17:27.7341 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a19f121d-81e1-4858-a9d8-736e267fd4c7 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 5+bheSceS9id0Mb3Ibl/W9ZpWaCQvPi5gYs+4hmDZkKYF6HGOpZ8mPXWm00nBN2Aqo9DAseBirrU3xRjf6Q0e0nvO7N2P6ngWWw2pH7+sbU= X-MS-Exchange-Transport-CrossTenantHeadersStamped: OS3PR01MB6920 List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk --_000_TYCPR01MB1131647E781856780072FBAE9E8B0ATYCPR01MB11316jp_ Content-Type: text/plain; charset="iso-2022-jp" Content-Transfer-Encoding: quoted-printable Hi Pavel-san, Iwata-san, +1 to Allow-background-workers-to-be-terminated The result is same, so I think it's better to prioritize compatibility. PGWORKER_PROTECTED would be used in scenarios like the following: Existing features are probably not designed to be forcibly stopped. Therefore, all existing features should have PROTECTED applied to them. Most newly implemented features will also have PROTECTED applied because it= requires less thought and is safer. Only considerate developers of features that can easily guarantee safety wo= uld adopt the default. In conclusion, this is no different from BGWORKER_INTERRUPTABLE. Therefore, I think it's better to prioritize compatibility. Best Regards Ryo Matsumura --_000_TYCPR01MB1131647E781856780072FBAE9E8B0ATYCPR01MB11316jp_ Content-Type: text/html; charset="iso-2022-jp" Content-Transfer-Encoding: quoted-printable
Hi Pavel-san, Iwata-san, 

+1 to Allow-background-workers-to-be-terminated

The result is same, so I think it's better to prioritize compatibility.

PGWORKER_PROTECTED would be used in scenarios like the following:
Existing features are probably not designed to be forcibly stopped.
Therefore, all existing features should have PROTECTED applied to them.
Most newly implemented features will also have PROTECTED applied because it= requires less thought and is safer.
Only considerate developers of features that can easily guarantee safe= ty would adopt the default.

In conclusion, this is no different from BGWORKER_INTERRUPTABLE.
Therefore, I think it's better to prioritize compatibility.

Best Regards
Ryo Matsumura
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