????????????????????? ?????? ???????????????????????????????????? ?????????????????????????????????????????? ??????? ??????- ??????????? ???????????????????????????????????? ??? ?????????????????????????????????????????????????????????????????????????????????? ????????????????? ???????????????????????????? ???????????????????????????? ?????????????

By default, pg_upgrade will wait for all files in the upgraded cluster to be prepared properly to disk. this selection brings about pg_upgrade to return without waiting, which is faster, but implies that a subsequent functioning procedure crash can leave the data directory corrupt. normally, this option is beneficial for screening but shouldn't be