{"Entry":{"collection":"storage","key":"pgdata-postmaster-pid","name":"postmaster.pid","aliases":[],"metadata":{"aliases":[],"category":"PGDATA paths","content_hash":"1d223a8a8bb85dde7368f079bef77b4f12a57f2398925e7beac20f9fc7a870b4","imported_at":"2026-09-30T00:40:47.059596+08:00","name":"postmaster.pid","name_zh":"","slug":"pgdata-postmaster-pid","summary":"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)"}},"Definition":{"Collection":"storage","Key":"pgdata-postmaster-pid","SourceDatabase":"center","Version":"18","SourceTable":"storage_structure","SourceKey":"pgdata-postmaster-pid","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","Facts":{"comparison_data":{"definition":"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)","path":"postmaster.pid"},"comparison_hash":"1fc88e6dc24a0d1bdeb90790f314b2b799ae31a1a590597d09e3bafb3992f37f","description":["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)"],"facts":[{"label":"Relative path","value":"postmaster.pid"}],"manual_html":"\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ccode class=\"filename\"\u003epostmaster.pid\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eA 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 \u003ccode class=\"literal\"\u003e*\u003c/code\u003e, or empty if not listening on TCP), and shared memory segment ID (this file is not present after server shutdown)\u003c/td\u003e\n\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e","manual_path":"/docs/18/storage-file-layout.html","related":[{"label":"Database file layout","url":"/wiki/storage/storage-file-layout/?v=18"}],"release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sections":[],"signature":"$PGDATA/postmaster.pid","sources":[{"label":"PostgreSQL 18 English manual","path":"storage-file-layout.html","sha256":"8cdf46b5af669f41f0a77c2541863d63454ef8fbb44d22a75e576cf1a7efc9c9","url":"/docs/18/storage-file-layout.html#PGDATA-CONTENTS-TABLE"}],"tables":[]},"ManualEvidence":{"manual_path":"/docs/18/storage-file-layout.html","release":{"channel":"stable","label":"18.6","major":"18","ref":"https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2","revision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"},"sources":[{"label":"PostgreSQL 18 English manual","path":"storage-file-layout.html","sha256":"8cdf46b5af669f41f0a77c2541863d63454ef8fbb44d22a75e576cf1a7efc9c9","url":"/docs/18/storage-file-layout.html#PGDATA-CONTENTS-TABLE"}]},"MeasuredEvidence":{}},"Text":{"Collection":"storage","Key":"pgdata-postmaster-pid","SourceDatabase":"center","Version":"18","Locale":"en","Title":"postmaster.pid","Summary":"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)","BodyHTML":"\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ccode\u003epostmaster.pid\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eA 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 \u003ccode\u003e*\u003c/code\u003e, or empty if not listening on TCP), and shared memory segment ID (this file is not present after server shutdown)\u003c/td\u003e\n\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e","SourceRevision":"555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f","ContentHash":"b62d67547e781f5ee0ee9b381c96cfb65f539ba4bc9e8f18d04697f6fbc05e34","Payload":{"description":["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)"],"manual_html":"\u003ctable\u003e\u003ctbody\u003e\u003ctr\u003e\n\u003ctd\u003e\u003ccode class=\"filename\"\u003epostmaster.pid\u003c/code\u003e\u003c/td\u003e\n\u003ctd\u003eA 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 \u003ccode class=\"literal\"\u003e*\u003c/code\u003e, or empty if not listening on TCP), and shared memory segment ID (this file is not present after server shutdown)\u003c/td\u003e\n\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e","related":[{"label":"Database file layout","url":"/wiki/storage/storage-file-layout/?v=18"}],"sections":[],"tables":[]}},"RequestedLocale":"zh-Hans","Fallback":true,"Versions":["10","11","12","13","14","15","16","17","18","19","20"],"Locales":["en"],"Signatures":null,"Spellings":null,"SQLState":null,"Evidence":null}