Horton

Re: pg_preadv() and pg_pwritev()

Tom Lane <tgl@sss.pgh.pa.us>

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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Sergey Shinderuk <s.shinderuk@postgrespro.ru>
Cc: Thomas Munro <thomas.munro@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2021-01-14T18:31:40Z
Lists: pgsql-hackers 
I wrote:
> It seems like the more productive approach would be to try to identify
> the right sysroot to use.  I wonder if there is some less messy way
> to find out the compiler's default sysroot than to scrape it out of
> -v output.

This is, of course, not terribly well documented by Apple.  But
Mr. Google suggests that "xcrun --show-sdk-path" might serve.
What does that print for you?

			regards, tom lane

Commits

  1. Improve our heuristic for selecting PG_SYSROOT on macOS.

  2. Move our p{read,write}v replacements into their own files.

  3. Don't use elog() in src/port/pwrite.c.

  4. Use vectored I/O to fill new WAL segments.

  5. Provide pg_preadv() and pg_pwritev().