On Wed, Mar 27, 2024 at 7:39 AM David Rowley <dgrowleyml@gmail.com> wrote: > Robert, I understand you'd like a bit more from this patch. I'm > wondering if you planning on blocking another committer from going > ahead with this? Or if you have a reason why the current state of the > patch is not a meaningful enough improvement that would justify > possibly not getting any improvements in this area for PG17?
So, I think that the first version of the patch, when it got a big chunk of data, would just flush whatever was already in the buffer and then send the rest without copying.
Correct.
The current version, as I understand it, only does that if the buffer is empty; otherwise, it copies data as much data as it can into the partially-filled buffer.
Yes, currently it should fill and flush the buffer first, if it’s not already empty. Only then it sends the rest without copying.
