pg_track_settings
Track settings changes
Overview
| Package | Version | Category | License | Language |
|---|---|---|---|---|
pg_track_settings | 2.1.2 | STAT | PostgreSQL | SQL |
| ID | Extension | Bin | Lib | Load | Create | Trust | Reloc | Schema |
|---|---|---|---|---|---|---|---|---|
| 6260 | pg_track_settings | No | Yes | No | Yes | Yes | No | - |
| Related | pg_show_plans powa pg_stat_statements pg_profile pg_store_plans auto_explain pg_stat_kcache pg_qualstats |
|---|
Version
| Type | Repo | Version | PG Ver | Package | Deps |
|---|---|---|---|---|---|
| EXT | PGDG | 2.1.2 | 1817161514 | pg_track_settings | - |
| RPM | PGDG | 2.1.2 | 1817161514 | pg_track_settings_$v | - |
| DEB | PGDG | 2.1.2 | 1817161514 | postgresql-$v-pg-track-settings | - |
Install
You can install pg_track_settings directly. First, make sure the PGDG repository is added and enabled:
pig repo add pgdg -u # Add PGDG repo and update cache
Install the extension using pig or apt/yum/dnf:
pig install pg_track_settings; # Install for current active PG version
pig ext install -y pg_track_settings -v 18 # PG 18
pig ext install -y pg_track_settings -v 17 # PG 17
pig ext install -y pg_track_settings -v 16 # PG 16
pig ext install -y pg_track_settings -v 15 # PG 15
pig ext install -y pg_track_settings -v 14 # PG 14
dnf install -y pg_track_settings_18 # PG 18
dnf install -y pg_track_settings_17 # PG 17
dnf install -y pg_track_settings_16 # PG 16
dnf install -y pg_track_settings_15 # PG 15
dnf install -y pg_track_settings_14 # PG 14
apt install -y postgresql-18-pg-track-settings # PG 18
apt install -y postgresql-17-pg-track-settings # PG 17
apt install -y postgresql-16-pg-track-settings # PG 16
apt install -y postgresql-15-pg-track-settings # PG 15
apt install -y postgresql-14-pg-track-settings # PG 14
Create Extension:
CREATE EXTENSION pg_track_settings;
Usage
pg_track_settings records changes to PostgreSQL settings over time, tracking both global settings (pg_settings) and per-role/database overrides (pg_db_role_setting).
Taking Snapshots
Call periodically (via cron or PoWA) to capture current settings:
SELECT pg_track_settings_snapshot();
Viewing Settings at a Point in Time
-- All settings at a specific time
SELECT * FROM pg_track_settings('2024-01-15 10:00:00');
-- All overloaded (per-role/database) settings at a specific time
SELECT * FROM pg_track_db_role_settings('2024-01-15 10:00:00');
Comparing Settings Between Two Times
-- Find what changed in the last hour
SELECT * FROM pg_track_settings_diff(now() - interval '1 hour', now());
-- Compare overloaded settings
SELECT * FROM pg_track_db_role_settings_diff(now() - interval '1 hour', now());
Viewing Change History
-- History of a specific setting
SELECT * FROM pg_track_settings_log('work_mem');
-- History of an overloaded setting
SELECT * FROM pg_track_db_role_settings_log('work_mem');
-- PostgreSQL restart history
SELECT * FROM pg_reboot;
Resetting History
SELECT pg_track_settings_reset();
Functions Summary
| Function | Description |
|---|---|
pg_track_settings_snapshot() | Capture current settings |
pg_track_settings(timestamptz) | All settings at a given time |
pg_track_settings_diff(timestamptz, timestamptz) | Settings that changed between two times |
pg_track_settings_log(text) | History of a specific setting |
pg_track_db_role_settings(timestamptz) | Overloaded settings at a given time |
pg_track_db_role_settings_diff(timestamptz, timestamptz) | Overloaded settings changes |
pg_track_db_role_settings_log(text) | History of a specific overloaded setting |
pg_track_settings_reset() | Clear all history |
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