格雷格·萨比诺·穆兰：解析Postgres的Postmaster文件
You may have noticed a file called postmaster.pid inside your data directory. This file gets created when Postgres first starts up, and gets removed on a clean shutdown. It seems to contain some...
postmaster.pid是Postgres启动时创建的文件，包含父进程PID、数据目录、启动时间、监听端口号、Unix套接字目录、TCP/IP接口、共享内存键和ID以及当前状态。该文件用于判断Postgres是否正在运行。
