Wiki / 存储结构

A lock file recording the current postmaster process ID (PID), cluster data directory path, postmaster start timestamp, port number, Unix-domain socket directory path (could be empty), first valid listen_address (IP address or * , or empty if not listening on TCP), and shared memory segment ID (this file is not present after server shutdown)

此版本暂无所选语言的定义，以下显示原始英文内容。

Relative path

postmaster.pid

manual path

/docs/18/storage-file-layout.html

signature

$PGDATA/postmaster.pid