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Since 9.3 we have used anonymous shared mmap for our main shared memory region, except in EXEC_BACKEND builds. Provide a GUC so that users can opt for System V shared memory once again, like in 9.2 and earlier. A later patch proposes to add huge/large page support for AIX, which requires System V shared memory and provided the motivation to revive this possibility. It may also be useful on some BSDs. Author: Andres Freund (revived and documented by Thomas Munro) Discussion: https://postgr.es/m/HE1PR0202MB28126DB4E0B6621CC6A1A91286D90%40HE1PR0202MB2812.eurprd02.prod.outlook.com Discussion: https://postgr.es/m/2AE143D2-87D3-4AD1-AC78-CE2258230C05%40FreeBSD.org |
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