?????????????????????????????????????????????????????????????? ????????????????????????? ??????????????? ????????????????????????????? ????????????????/????????????? ???????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????? ???? ???????? ????????????????????? ????????????????????????? ???

By default, pg_upgrade will wait for all documents in the upgraded cluster to become written properly to disk. this selection results in pg_upgrade to return without the need of waiting around, which is quicker, but implies that a subsequent working technique crash can go away the info Listing corrupt. Generally, this feature is helpful for testing