| From: | Thomas Munro <thomas(dot)munro(at)gmail(dot)com> |
|---|---|
| To: | Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Noah Misch <noah(at)leadboat(dot)com>, Peter Smith <smithpb2250(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, vignesh C <vignesh21(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Melanie Plageman <melanieplageman(at)gmail(dot)com> |
| Subject: | Re: Relation bulk write facility |
| Date: | 2024-02-24 22:16:43 |
| Message-ID: | CA+hUKGLAr9Rki58cNCdv_ivR5=Uyps5v-e-bEhHUK3gJTT7wtQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Feb 25, 2024 at 11:06 AM Heikki Linnakangas <hlinnaka(at)iki(dot)fi> wrote:
> Regarding the issue at hand, perhaps we should define PG_IO_ALIGN_SIZE as 16 on AIX, if that's the best the linker can do on that platform.
You'll probably get either an error or silently fall back to buffered
I/O, if direct I/O is enabled and you try to read/write a badly
aligned buffer. That's documented (they offer finfo() to query it,
but it's always 4KB for the same sort of reasons as it is on every
other OS).
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