Re: Use fadvise in wal replay

[Andrey Borodin]

> On 21 Jun 2022, at 12:35, Amit Kapila <amit.kapil...@gmail.com> wrote:
> 
> I wonder if the newly introduced "recovery_prefetch" [1] for PG-15 can
> help your case?

AFAICS recovery_prefetch tries to prefetch main fork, but does not try to 
prefetch WAL itself before reading it. Kirill is trying to solve the problem of 
reading WAL segments that are our of OS page cache.

Best regards, Andrey Borodin.