| Item | Description |
| 01.文件 | |
| PG_VERSION | 包含 PostgreSQL 主版本号的文件 |
| postgresql.auto.conf | 配置文件，使用 ALTER SYSTEM命令 修改后的参数写入该文件 |
| postmaster.opts | A file recording the command-line options the server was last started with |
| postmaster.pid | 主进程PID文件 |
| 02.目录 | |
| base | Subdirectory containing per-database subdirectories |
| current_logfiles | File recording the log file(s) currently written to by the logging collector |
| global | Subdirectory containing cluster-wide tables, such as pg_database |
| pg_commit_ts | Subdirectory containing transaction commit timestamp data |
| pg_dynshmem | Subdirectory containing files used by the dynamic shared memory subsystem |
| pg_logical | Subdirectory containing status data for logical decoding |
| pg_multixact | Subdirectory containing multitransaction status data (used for shared row locks) |
| pg_notify | Subdirectory containing LISTEN/NOTIFY status data |
| pg_replslot | Subdirectory containing replication slot data |
| pg_serial | Subdirectory containing information about committed serializable transactions |
| pg_snapshots | Subdirectory containing exported snapshots |
| pg_stat | Subdirectory containing permanent files for the statistics subsystem |
| pg_stat_tmp | Subdirectory containing temporary files for the statistics subsystem |
| pg_subtrans | Subdirectory containing subtransaction status data |
| pg_tblspc | Subdirectory containing symbolic links to tablespaces |
| pg_twophase | Subdirectory containing state files for prepared transactions |
| pg_wal | Subdirectory containing WAL (Write Ahead Log) files |
| pg_xact | Subdirectory containing transaction commit status data |