671eb8f344
Commit 464824323e introduced the wait events which were neither used by that commit nor by follow-up commits for that work. Author: Masahiro Ikeda Backpatch-through: 14, where it was introduced Discussion: https://postgr.es/m/ff077840-3ab2-04dd-bbe4-4f5dfd2ad481@oss.nttdata.com