Aug 31 10:55:53 localhost.localdomain postmaster[1716]: 2022-08-31 10:55:53.775 CST [1716] LOG: could not open directory "pg_tblspc/memory/PG_12_201909212/pgsql_tmp": Not a directory
Aug 31 10:55:53 localhost.localdomain postmaster[1716]: 2022-08-31 10:55:53.775 CST [1716] LOG: could not open directory "pg_tblspc/memory/PG_12_201909212": Not a directory
Aug 31 10:55:53 localhost.localdomain postmaster[1716]: 2022-08-31 10:55:53.775 CST [1716] LOG: could not open directory "pg_tblspc/prememory/PG_12_201909212/pgsql_tmp": Not a directory
Aug 31 10:55:53 localhost.localdomain postmaster[1716]: 2022-08-31 10:55:53.775 CST [1716] LOG: could not open directory "pg_tblspc/prememory/PG_12_201909212": Not a directory
Aug 31 10:55:53 localhost.localdomain postmaster[1716]: 2022-08-31 10:55:53.793 CST [1716] LOG: redirecting log output to logging collector process
Aug 31 10:55:53 localhost.localdomain postmaster[1716]: 2022-08-31 10:55:53.793 CST [1716] HINT: Future log output will appear in directory "log".
Aug 31 10:55:54 localhost.localdomain systemd[1]: postgresql-12.service: main process exited, code=exited, status=1/FAILURE
Aug 31 10:55:54 localhost.localdomain systemd[1]: Failed to start PostgreSQL 12 database server.
Aug 31 10:55:54 localhost.localdomain systemd[1]: Unit postgresql-12.service entered failed state.
Aug 31 10:55:54 localhost.localdomain systemd[1]: postgresql-12.service failed.
Aug 31 10:55:53 localhost.
1、机房断电后重启pg数据库，报如下错误：
