On Sun, Feb 25, 2024 at 11:06 AM Heikki Linnakangas <hlinn...@iki.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).
