On Tue, Sep 22, 2026 at 11:23 AM Tomas Vondra <tomas@vondra.me> wrote:
> In other words, I/O and buffers may disagree - that's not a bug. Those
> counters are tracking different things.
>
> To handle this correctly, we'd need to find a way to not issue the I/O
> at all (since 862092932c9479b79732f3b441da05453ea5e06d we discard I/O
> that was not initiated yet).
Isn't this what Andres' experimental "Make read_stream_reset()/end()
not wait for IO" patch does? See:
https://www.postgresql.org/message-id/f3xxfrkafjxpyqxywcxricxgyizjirfceychyxsgn7bwjp5eda@kwbduhy7tfmu
This is one of the patches that I've been posting as part of the index
prefetching patch series for some time now.
--
Peter Geoghegan
