Re: pageinspect get_raw_page() option to return invalid pages

On Fri, May 4, 2018 at 11:41 AM, Andres Freund <andres(at)anarazel(dot)de> wrote:
> Hi,
>
> Currently there's no convenient way to get a corrupted page (be it a
> checksum failure, corrupted pd_upper/lower or whatnot) via pageinspect's
> get_raw_page(). Given that pageinspect is kind of our tool to do inspect
> issues on a data level that's not so great.
>
> I therefore propose that we add an *option* that bypasses shared buffers
> and reads the underlying data directly. And then skips over the
> validation. I'm not 100% sure if this should be done unconditionally,
> or only if the item wasn't found in cache. There's some coherency
> differences, obviously.

+1. This would be a good option for amcheck, too.

--
Peter Geoghegan