Re: pgBufferUsage.blk_{read|write}_time are zero although there are pgBufferUsage.local_blks_{read|written}

On Tue, Oct 31, 2023 at 08:17:52AM +0900, Michael Paquier wrote:
> Thanks for the input. I was looking yesterday if this code was
> available somewhere, but couldn't find it.. Until this morning:
> https://gitlab.com/depesz/explain.depesz.com.git

Well, the parser itself is https://gitlab.com/depesz/Pg--Explain/ :)

> And.. It looks like things would become better if we change
> "shared/local" to "shared", because the parsing code seems to have an
> issue once you add a '/'. All the fields in I/O Timings are
> considered as part of a Node, and they're just included in the output.
> Now, pasting a plan that includes "shared/local" drops entirely the
> string from the output result, so some information is lost. In short,
> imagine that we have the following string in a node:
> I/O Timings: shared/local write=23.77
>
> This would show up like that, meaning that the context where the
> write/read timings happened is lost:
> I/O Timings: write=23.77
>
> If we switch back to "shared", the context would be kept around. Of
> course, this does not count for all the parsers that may be out
> there, but at least that's something.

Well, if it's possible to deduce what is the meaning in given line,
I can add the logic to do the deduction to parser.

Also, I want to say that I appreciate being looped in the discussion.

Best regards,

depesz