Re: WIP: WAL prefetch (another approach)

Andres Freund <andres@anarazel.de> writes:
> I was now able to reproduce the problem again, and I'm afraid that the
> bug I hit is likely separate from Tom's.

Yeah, I think so --- the symptoms seem quite distinct.

My score so far today on the G4 is:

12 error-free regression test cycles on b3ee4c503

(plus one more with shared_buffers set to 16MB, on the strength
of your previous hunch --- didn't fail for me though)

HEAD failed on the second run with the same symptom as before:

2021-04-28 22:57:17.048 EDT [50479] FATAL:  inconsistent page found, rel 1663/58183/69545, forknum 0, blkno 696
2021-04-28 22:57:17.048 EDT [50479] CONTEXT:  WAL redo at 4/B72D408 for Heap/INSERT: off 77 flags 0x00; blkref #0: rel
1663/58183/69545,blk 696 FPW 

This seems to me to be pretty strong evidence that I'm seeing *something*
real.  I'm currently trying to isolate a specific commit to pin it on.
A straight "git bisect" isn't going to work because so many people had
broken so many different things right around that date :-(, so it may
take awhile to get a good answer.

            regards, tom lane