Menjo-san, On Mon, Feb 17, 2020 at 1:13 PM Takashi Menjo <takashi.menjou...@hco.ntt.co.jp> wrote: > I applied my patchset that mmap()-s WAL segments as WAL buffers to > refs/tags/REL_12_0, and measured and analyzed its performance with pgbench. > Roughly speaking, When I used *SSD and ext4* to store WAL, it was "obviously > worse" than the original REL_12_0.
I apologize for not having any opinion on the patches themselves, but let me point out that it's better to base these patches on HEAD (master branch) than REL_12_0, because all new code is committed to the master branch, whereas stable branches such as REL_12_0 only receive bug fixes. Do you have any specific reason to be working on REL_12_0? Thanks, Amit