Wiki / Storage Structures / PGDATA paths
postmaster.pid
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 li…
Reading PostgreSQL 18.6.
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)
- Relative path
- postmaster.pid
Usage
$PGDATA/postmaster.pidManual definition
postmaster.pid |
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) |
Related entries
Documentation and source
Source build
- Version
- 18.6
- Build
- https://ftp.postgresql.org/pub/source/v18.6/postgresql-18.6.tar.bz2
- Source fingerprint
555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f
Compare versions
PostgreSQL 12 → 13: changed.
--- PostgreSQL 12
+++ PostgreSQL 13
@@ -1,4 +1,4 @@
{
- "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 (empty on Windows), 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": "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"
}Compares recorded interfaces and attributes. Source fingerprints and build metadata are excluded; an absent sample is not proof of the introduction or removal release.
Related entries
Export JSON · Back to Storage Structures · Recorded in PostgreSQL 10 through 20; the first sample is not necessarily its introduction.