Обсуждение: The huge_pages parameter doesn't work when shared_memory_type is sysv
The following documentation comment has been logged on the website: Page: https://www.postgresql.org/docs/13/kernel-resources.html Description: It seems that the huge_pages parameter is ignored when shared_memory_type is sysv. The server successfully starts with huge_pages=on, but actually doesn't use huge pages (relying on /proc/meminfo). I think that this is worth mentioning in the "Linux Huge Pages" section.
On Mon, Sep 27, 2021 at 9:04 PM PG Doc comments form <noreply@postgresql.org> wrote: > The following documentation comment has been logged on the website: > > Page: https://www.postgresql.org/docs/13/kernel-resources.html > Description: > > It seems that the huge_pages parameter is ignored when shared_memory_type is > sysv. The server successfully starts with huge_pages=on, but actually > doesn't use huge pages (relying on /proc/meminfo). I think that this is > worth mentioning in the "Linux Huge Pages" section. Yeah. The thread that added shared_memory_type=sysv had an unfinished follow-up patch that stalled[1]. The goal of that patch was to add huge page support for shared_memory_type=sysv on AIX, and it is still waiting for testing and polishing by an AIX-enabled hacker. That second patch included exactly such a documentation adjustment, and an error message too (the idea was to reject that combination on Linux but allow it on AIX). Here are those bits, extracted. https://www.postgresql.org/message-id/flat/HE1PR0202MB28126DB4E0B6621CC6A1A91286D90%40HE1PR0202MB2812.eurprd02.prod.outlook.com
Вложения
Hello Thomas, 22.10.2021 06:59, Thomas Munro wrote: > That > second patch included exactly such a documentation adjustment, and an > error message too (the idea was to reject that combination on Linux > but allow it on AIX). Here are those bits, extracted. > > https://www.postgresql.org/message-id/flat/HE1PR0202MB28126DB4E0B6621CC6A1A91286D90%40HE1PR0202MB2812.eurprd02.prod.outlook.com Thanks for the fix! It works and looks correct to me. Best regards, Alexander
On Sat, Oct 23, 2021 at 9:20 AM Alexander Lakhin <exclusion@gmail.com> wrote: > Thanks for the fix! It works and looks correct to me. Pushed. Thanks.