PG Exporter Blog on PG Exporter

PG Exporter v1.6.0

Vonng — Mon, 09 Nov 2026 10:00:00 +0800

PG Exporter v1.6.0 separates health probes from collection, bounds overlapping metrics requests, preserves completed bounded refreshes after client cancellation, and corrects cross-database progress labels. It also supplies container trust roots and updates dependencies. The Go toolchain remains 1.27.3 and the PostgreSQL driver remains lib/pq 1.12.3.

Changes

Independent health probes: slow metrics collection no longer blocks the background probe. Completing a scrape no longer overwrites a newer reachability or role observation. After initialization, HTTP health is written only by the probe; pg_up and pg_in_recovery remain collection results. A reachable database can return /up HTTP 200 even when a fatal collector makes pg_up zero.
Controlled overlapping scrapes: at most two metrics requests are admitted, including waiting and response writing. Collection remains serial. The second request can wait and reuse caches; extra requests receive HTTP 503. Waiting can be canceled without starting SQL. The request budget is 30 seconds, shortened by a valid positive finite Prometheus scrape-timeout header.
Collector-level cancellation: request cancellation prevents the next collector or database from starting. A collector already running with a positive timeout continues its predicates and main SQL under one shared deadline, then caches its result normally. This prevents a departing client from turning a healthy bounded refresh into a failure cached for other scrapers. A negative timeout removes the collector deadline and lets the request cancel its SQL.
Clearer interruption accounting: interrupted passes have an INFO interrupted summary and do not increment exporter/server scrape-error counts. Availability preserves the previous value, or becomes true after a successful precheck. Non-interrupted connection and fatal collector failures still count. Query-error statistics and fatal-query ERROR logs remain unchanged.
Correct progress labels: pg_vacuuming, pg_indexing, and pg_clustering retain cluster-wide coverage and three queries per refresh. Relations in the connected database and system catalogs resolve to names; user relations in other databases use numeric OIDs in relname, retaining datname and pid. An unrelated local relation can no longer supply a misleading name. Discovery filters or a lack of CONNECT do not filter out visible progress rows.
Container trust: both scratch-image build paths include the system CA bundle and license. Public CA verification can use the bundled trust store. Private CAs still require an explicit mount and sslrootcert; the default TLS mode is unchanged.
Dependencies and validation: YAML moves from v3 to v4 with the existing collector syntax retained. Prometheus common/procfs, golang.org/x/net, and supporting dependencies are updated. CI verifies container payload/TLS behavior and inspects all DEB architectures, in addition to RPM compatibility and checksums.
Collector descriptions: help text now distinguishes I/O bytes and operations, completed checkpoints, vacuum dead-tuple memory, and CLUSTER progress. SQL metric names, label keys, types, and units are unchanged on the same PostgreSQL version.

Upgrade notes

Upgrade the configuration with the binary. Merge the new pg_exporter.yml or split YAML files; package upgrades preserve local configuration. A binary-only upgrade does not fix progress SQL. The bundle still contains 58 YAML files, 96 branches, 59 namespaces, and 460 distinct metric definitions, including disabled collectors and two unexpanded histograms.
Check progress-label consumers. Cross-database relname values can change from an incorrect name to an OID, creating new time series. Preserve database and task identity in dashboards. Names in the connected database and names of system catalogs remain readable.
Choose the right health signal. /up and role endpoints reflect the latest health probe. pg_up reflects main-target collection, including fatal collector failures. Non-fatal and child-database errors require their query/server metrics. --disable-intro hides all built-in metrics, including pg_up, while HTTP health remains available.
Allow the PgBouncer probe connection. The main PgBouncer pool maximum changes from one to two connections. PostgreSQL keeps three on the main target and one per discovered database.
Keep positive timeouts on fatal collectors. Canceling a negative-timeout fatal query caches its failure for the normal TTL. A subsequent live scrape can count that cached failure and return pg_up 0 until a successful refresh. TTL zero or --disable-cache still forces a refresh on every scrape.
Review scrape concurrency and budgets. Excess requests or interrupted collection can return 503. A started bounded collector can extend work beyond the request budget, normally by up to its own timeout. Network stalls can last longer; neither timeout is a hard wall-clock guarantee, and connection handshakes need an appropriate DSN connect_timeout.

A real error coinciding with request cancellation can be omitted from the two pass-error counters because classification uses both the pass error and the request context. Query-level failures remain visible. A first scrape interrupted before a successful precheck leaves pg_up at zero until later recovery. Failure TTL, reload behavior, and immediate SIGTERM exit remain unchanged; this release does not add background refresh or graceful shutdown.

Bounded SQL Scrapes and Client Cancellation

Vonng — Mon, 09 Nov 2026 00:00:00 +0800

v1.6.0: bounded waiting for two scrapers, request cancellation, and the existing failure-cache policy.

Cluster Progress with Safe Relation Labels

Vonng — Mon, 09 Nov 2026 00:00:00 +0800

v1.6.0: keep cluster-wide progress and use numeric OIDs for user relations in other databases.

Container Trust Roots and Release Checks

Vonng — Sun, 08 Nov 2026 00:00:00 +0800

v1.6.0: include CA roots and the license in both scratch images, and exercise TLS and DEB artifacts in release validation.

PG Exporter v1.5.0

Vonng — Fri, 23 Oct 2026 09:36:11 +0800

PG Exporter v1.5.0 updates the Go toolchain and dependencies, fixes replication collector identity and state mappings, and closes six runtime defects around target URLs, discovery, health, collector planning, durations, and HTTP routing.

The bundle still contains 58 YAML files, 96 collector branches, 59 namespaces, and 460 distinct metric definitions. The metric count spans all version branches, including disabled collectors and two unexpanded SQL histograms; it is not a promise of 460 series in each scrape.

Target Identity and Consistent Health Responses

Vonng — Fri, 23 Oct 2026 00:00:00 +0800

v1.5.0 target-state guarantees, with the v1.6.0 amendment separating health probes from collection.

Correcting Replication Collector Identity and Semantics

Vonng — Thu, 22 Oct 2026 00:00:00 +0800

Shipped in v1.5.0. Add database identity to subscriptions, correct receiver mappings, and clarify optional permissions and table/sequence counts.

Turning PostgreSQL CSV Logs into Durable Metrics

Vonng — Mon, 24 Aug 2026 12:17:38 +0800

Implemented but unreleased. A default-off worker persists CSV cursors and aggregates before publishing cumulative log metrics.

Caching pgBackRest Metrics Outside the Scrape Path

Vonng — Sun, 23 Aug 2026 19:34:09 +0800

Implemented but unreleased. Background collection keeps command and repository latency out of Prometheus requests. Failed refreshes retain the last valid backup state.

The PostgreSQL Observability Product We Chose Not to Build

Vonng — Thu, 13 Aug 2026 14:17:01 +0800

Superseded on 2026-08-24. CSV parsing and durable-state requirements became a bounded log-metrics feature; the separate product was dropped.

One Endpoint, Several Sources: The Composite Exporter Contract

Vonng — Tue, 11 Aug 2026 23:50:55 +0800

Implemented but unreleased. PostgreSQL remains authoritative. Live sources share a timeout; cached sources publish immutable snapshots.

PG Exporter v1.4.1

Vonng — Wed, 29 Jul 2026 21:31:19 +0800

v1.4.1 is a maintenance release focused on metric accuracy and RPM upgrade compatibility.

Highlights

Fix pg_subrel_count overcounting when parallel logical replication apply workers are active: deduplicate pg_stat_subscription by subscription ID and name before aggregating subscription relation states
If a query result omits a configured LABEL column, that collector’s scrape now fails atomically instead of emitting an empty label or retaining stale results; other non-fatal collectors continue normally
Rename the official RPM package and artifact prefix from pg_exporter to pg-exporter; the new package provides and obsoletes the legacy name, allowing direct upgrades
Refresh version and standalone package metadata, add missing-label regression coverage, and validate RPM configuration, artifact names, and compatibility metadata in CI

Upgrade Notes

Custom collector SQL must return every LABEL column; the result schema must remain complete even when the query returns zero rows
If automation matches GitHub RPM file names directly, update pg_exporter-*.rpm to pg-exporter-*.rpm

v1.4.1 · 2026-07-29

PG Exporter v1.4.0

Vonng — Sat, 18 Jul 2026 10:41:26 +0800

v1.4.0 introduces the Snapshot Histogram metric type and the new pg_xact_age transaction age collector, along with a round of systematic hardening across HTTP routing, packaging, and the build toolchain.

New Features

New HISTOGRAM column type: SQL observations are grouped by labels into snapshot distributions. The _bucket, _count, and _sum families are Gauges. Bucket bounds must be finite and strictly increasing; +Inf is added automatically. The le label is reserved, and reload replaces the bucket layout
New pg_xact_age collector: exposes the distribution of open transaction age (pg_xact_age_seconds) and idle-in-transaction age (pg_xact_age_idle_seconds) as histograms; cluster-level collection, client backends only, 10s TTL
Default config bundle grows from 57 to 58 definition files; pg_xact_age takes slot 0450, with pg_lock / pg_lock_stat / pg_query renumbered to 0460 / 0470 / 0480 (contents unchanged)

Fixes & Improvements

HTTP route registration is isolated to a private ServeMux instead of the global DefaultServeMux, so endpoints registered by third-party libraries can no longer be exposed accidentally
--web.telemetry-path is strictly validated at startup: empty paths, paths not starting with /, paths containing ? # { }, conflicts with built-in endpoints, and non-canonical paths like //metrics that could never be matched all fail fast with a clear error
The landing page HTML-escapes the telemetry path
The primary connection pool is properly closed when --fail-fast pre-check fails
RPM / DEB packaging fixes (#105): the prometheus system user’s HOME now points to /var/lib/prometheus (where libpq looks for ~/.pgpass), and the packaged default URL gains the /postgres database name so libpq no longer falls back to a database named after the OS user
Version string unified with the v prefix: --version output, the /version endpoint, and the pg_exporter_build_info{version=...} label of official release binaries now report v1.4.0 (GoReleaser artifacts previously reported unprefixed 1.3.0); artifact file names, package versions, and Docker image tag conventions are unchanged
Histogram value casting aligned with the scalar path: timestamp and boolean columns are exempt from scale
GoReleaser embedded package metadata corrected: supported range updated to PostgreSQL 9.x - 19+ and PgBouncer 1.8 - 1.25+
make docker restores GOPROXY / GOSUMDB build-arg passthrough

Engineering & Build

Build toolchain updated to Go 1.26.5, exporter-toolkit v0.17.1, and prometheus/common v0.70.0
New regular CI verification workflow: module tidy check, generated-config drift check (make conf output must stay in sync with config/*.yml), race tests, and six-platform cross-builds
Docker build tooling consolidated: the docker/ scripts and make docker-release are removed; multi-arch release images are built by GoReleaser
Config coverage tests generalized: tests no longer assume specific collectors exist in the config directory, making trimmed custom bundles easier to maintain

Upgrade Notes

If you were running with a non-canonical telemetry path (e.g. //metrics), the process will now refuse to start — previously it started but the metrics endpoint was silently unreachable
Automation that parses the version label of pg_exporter_build_info or the --version output needs to accommodate the v prefix
When any HISTOGRAM collector is configured, le can no longer be used as a constant label
Query snapshot buckets directly with histogram_quantile(); do not apply rate() or increase(). See snapshot Histogram semantics.

Snapshot Histograms Are Gauges, Not Counters

Vonng — Sat, 11 Jul 2026 22:06:29 +0800

Shipped in v1.4.0. Each SQL execution builds a fresh distribution. Buckets, count, and sum are Gauges and can decrease between scrapes.

PG Exporter v1.3.0

Vonng — Wed, 24 Jun 2026 12:04:24 +0800

v1.3.0 adds PostgreSQL 19 support, and refreshes the default collector bundle, build toolchain, and config coverage tests.

Highlights

Default support range extended from PostgreSQL 10-18+ to 10-19+
Default config bundle includes 57 config/*.yml definition files
Build dependencies updated to Go 1.26.4, lib/pq v1.12.3, Prometheus client v1.23.2, and exporter-toolkit v0.16.0
pg_recovery_state: collect pg_stat_recovery on recovery nodes, exposing promotion trigger status, replay LSN, timeline, recovery transaction time, and pause state
pg_lock_stat: collect PG19 pg_stat_lock, exposing waits, wait time, and fast-path overflow counts by locktype
pg_vacuum_score: collect the current-database summary from pg_stat_autovacuum_scores, exposing max autovacuum score and candidate table count
pg_wal_19: expose wal_fpi_bytes on PG19 as pg_wal_fpi_bytes
pg_sub_19: adapt sequence sync and logical replication conflict stats from pg_stat_subscription_stats, while keeping sync_error_count for legacy dashboards
pg_recv: recognize the PG13+ WAL receiver connecting state on PG19
pg_slot: recognize the PG19 replication slot invalidation reason idle_timeout
pg_db_confl: switch to an explicit column list to avoid accidentally exporting future view columns
pg_backup, pg_vacuuming, and pg_clustering continue reusing stable existing branches instead of changing the metric surface for low-value PG19 fields

Checksums

SHA256 checksums

PG Exporter v1.2.2

Vonng — Tue, 14 Apr 2026 20:09:59 +0800

v1.2.2 updates release builds to Go 1.26.2. Exporter features and configuration are unchanged.

Checksums

SHA256 checksums

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v1.2.2 · 2026-04-14

PG Exporter v1.2.1

Vonng — Sat, 21 Mar 2026 09:23:31 +0800

v1.2.1 updates the build toolchain, standardizes configuration formatting, and adds configuration consistency tests. Collector behavior is unchanged.

Highlights

Refresh the build toolchain: bump both release workflows and Docker build images to Go 1.26.1
Standardize config style: switch inline description values in both current and legacy configs to double-quoted form, and regenerate merged pg_exporter.yml / legacy/pg_exporter.yml
Add config consistency tests: verify split and merged configs remain equivalent, and check inline metric description style to reduce configuration drift
Refresh packaging metadata: update RPM / DEB support descriptions to PostgreSQL 9.x - 18+ and PgBouncer 1.8 - 1.25+, and refresh Pigsty documentation links

Checksums

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v1.2.1 · 2026-03-21

PG Exporter v1.2.0

Vonng — Thu, 12 Feb 2026 19:37:24 +0800

v1.2.0 updates startup, hot reload, health checks, and configuration validation. It also adds a configuration bundle for PostgreSQL 9.1–9.6.

New Features

Add robust hot reload workflow: support platform-specific reload signals (SIGHUP / SIGUSR1) and strengthen POST /reload to refresh configs and query plans without process restart
Switch startup to non-blocking mode: HTTP endpoints come up first even when target precheck fails, making recovery and monitoring integration smoother
Add PostgreSQL 9.1-9.6 legacy config bundle: provide legacy/ configs and a make conf9 target for easier onboarding of EOL PostgreSQL versions
Rework health probing architecture: use cached health snapshots with periodic probes for more consistent role-based health endpoints and smoother reload behavior
Improve release engineering baseline: run go test and go vet in release workflows and bump build toolchain to Go 1.26.0

Bug Fixes

Fix multiple config parsing edge cases: reject malformed metrics entries, return explicit errors when config dirs fail to load valid YAML, and harden runtime fallbacks
Fix CLI bool flag parsing to correctly handle --flag=false style arguments
Fix /explain output/rendering behavior by adjusting content type handling and using safer template rendering
Fix predicate query and PG URL handling details: better BOOL/BOOLEAN predicate support, safer row lifecycle handling, and improved dbname query-parameter parsing/redaction
Fix resource cleanup when auto-discovered targets are removed by closing dropped server connections asynchronously
Fix metric/label validation details including const-label conflict checks, scaled default-value handling, and Prometheus naming/rule checks

Checksums

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v1.2.0 · 2026-02-12

PG Exporter v1.1.2

Vonng — Thu, 15 Jan 2026 23:06:15 +0800

Fixed the pg_timeline configuration and updated Go dependencies.

Checksums

SHA256 checksums

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v1.1.2 · 2026-01-15

PG Exporter v1.1.1

Vonng — Wed, 31 Dec 2025 00:03:31 +0800

Minor release with new collectors and bug fixes.

New Features

New pg_timeline collector for timeline monitoring
New pg_sub_16 collector branch to exclude parallel operations in subscriptions (PostgreSQL 16+ compatibility)

Bug Fixes

Fix: Add coalesce for slotname in pg_recv collector to handle NULL values

Checksums

SHA256 checksums

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v1.1.1 · 2025-12-31

Adopting the Victoria observability stack in Pigsty

Vonng — Wed, 17 Dec 2025 00:00:00 +0000

The December 2025 Pigsty v4 beta introduced VictoriaMetrics, VictoriaLogs, and VictoriaTraces. This article records the motivation, test results, and deployment model.

PG Exporter v1.1.0

Vonng — Mon, 15 Dec 2025 14:09:58 +0800

Updated dependencies and built with Go 1.25.5.

Collector Changes

pg_setting: Major refactor for PG10-18 compatibility with missing_ok support
- Add 15 new metrics: max_parallel_workers, max_parallel_workers_per_gather, max_parallel_maintenance_workers, shared_buffers, maintenance_work_mem, effective_cache_size, fsync, full_page_writes, autovacuum, autovacuum_max_workers, checkpoint_timeout, checkpoint_completion_target, hot_standby, synchronous_commit, io_method
- Rename work_memory_size to work_mem
- Change min_version from 9.6 to 10, explicit ::int type casting
pg_size: Fix log directory size detection, use logging_collector check instead of path pattern matching
pg_table: Performance optimization, replace LATERAL subqueries with JOIN for better query performance; fix tuples and frozenxid metric type from COUNTER to GAUGE; increase timeout from 1s to 2s
pg_vacuuming: Add PG17 collector branch with new metrics indexes_total, indexes_processed, dead_tuple_bytes for index vacuum progress tracking
pg_query: Increase timeout from 1s to 2s for high-load scenarios
pg_io: Fix typo in reuses description (“in reused” -> “is reused”)
pg_checkpointer: Fix description for pg_checkpointer_10 (“9.4+” -> “9.4-17”)
pg_db_confl: Fix description for pg_db_confl_15 (“9.1 - 16” -> “9.1 - 15”)
Format alignment fixes for pg_db, pg_indexing, pg_clustering, pg_backup

Other Changes

Fix release year by @anayrat

Checksums

SHA256 checksums

PG Exporter v1.0.3

Vonng — Thu, 20 Nov 2025 17:19:38 +0800

Updated dependencies and built with Go 1.25.4.
Fix #80 Conflict with libpq env variables
Change default value of auto-discovery to true by @kadaffy

Checksums

SHA256 checksums

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v1.0.3 · 2025-11-20

PG Exporter v1.0.2

Vonng — Thu, 14 Aug 2025 13:12:49 +0800

Updated dependencies and built with Go 1.25.0.
Added the PG Exporter website.
Release with GoReleaser for more operating systems and architectures with CI/CD pipeline:
- add windows amd64 support
- add linux ppc64le support

Checksums

SHA256 checksums

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v1.0.2 · 2025-08-14

PG Exporter v1.0.1

Vonng — Thu, 17 Jul 2025 09:15:40 +0800

Add Docker Hub images: pgsty/pg_exporter
Updated Go dependencies and built with Go 1.24.5.
Disable pg_tsdb_hypertable collector by default, since timescaledb catalog is changed.

Checksums

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v1.0.1 · 2025-07-17

PG Exporter v1.0.0

Vonng — Tue, 06 May 2025 23:43:42 +0800

Changes

Added PostgreSQL 18 collector branches:

Branch	Changes
`pg_wal_18`	Removed `write`, `sync`, `write_time`, and `sync_time`; PostgreSQL moved these statistics to `pg_stat_io`
`pg_checkpointer_18`	Added `num_done` and `slru_written`
`pg_db_18`	Added `parallel_workers_to_launch` and `parallel_workers_launched`
`pg_table_18`	Added `table_parallel_workers_to_launch` and `table_parallel_workers_launched`
`pg_io_18`	Added WAL statistics and `read_bytes`, `write_bytes`, and `extend_bytes`; removed `op_bytes`
`pg_vacuuming_18`	Added `delay_time`

Checksums

MD5 checksums published in the GitHub Release:

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v1.0.0 · 2025-05-06

PG Exporter v0.9.0

Vonng — Sat, 26 Apr 2025 23:12:49 +0800

Default Collectors

new metrics collector for timescaledb hypertable
new metrics collector for citus dist node
new metrics collector for pg_wait_sampling wait event profile
pg_slot overhaul: Add 16/17 pg_replication_slot metrics
allow pg_slot collector run on replica since 16/17
refactor pg_wait collector to agg from all processes
restrict pg_clustering, pg_indexing, pg_vacuuming run on primary
mark all reset_time as GAUGE rather than COUNTER
fix pg_recovery_prefetch_skip_fpw type from GAUGE to COUNTER
fix pg_recv.state type from LABEL to GAUGE
Format collector in compact mode
new default metric pg_exporter_build_info / pgbouncer_exporter_build_info
add server_encoding to pg_meta collector

Added 12 pg_setting metrics: wal_block_size, segment_size, wal_segment_size, wal_level, work_memory_size, shared_memory_size, hugepage_count, hugepage_status, max_wal_size, min_wal_size, max_slot_wal_keep_size, archive_mode.

Exporter Codebase

normalize collector branch name with min pg ver suffix
Add license file to binary packages
Moved the repository from Vonng/pg_exporter to pgsty/pg_exporter.
refactor server.go to reduce Compatible and PostgresPrecheck complexity
rename metrics collector with extra number prefix for better sorting
Updated dependencies.
execute fatal collectors ahead of all non-fatal collectors, and fail fast

v0.9.0 · 2025-04-26

PG Exporter v0.8.1

Vonng — Sat, 29 Mar 2025 12:33:55 +0800

Changes

Updated dependencies.
Bump golang.org/x/net from 0.35.0 to 0.36.0 #67
Update docker images building tags

v0.8.1 · 2025-03-29

PG Exporter v0.8.0

Vonng — Fri, 14 Feb 2025 15:40:25 +0800

Changes

Add PgBouncer 1.24 new metrics support (stat, pool, database)
Fix: 310-pg_size.yml fails if log dir not set properly #64 by @Süleyman Vurucu
Build with the latest Go 1.24 and bump all dependencies
Refactor logging with the standard log/slog instead of go-kit Full changelog

v0.8.0 · 2025-02-14

PG Exporter v0.7.1

Vonng — Sun, 29 Dec 2024 17:00:02 +0800

Changes

Routine update with dependabot

Feat: support specifying configuration as Reader by @ringerc in #62
Bump golang.org/x/crypto from 0.21.0 to 0.31.0 by @dependabot in #63
Fix some typos Full changelog

v0.7.1 · 2024-12-29

PG Exporter v0.7.0

Vonng — Tue, 13 Aug 2024 19:41:28 +0800

Changes

Updated the codebase for Go 1.22.4.

PostgreSQL 17 Metrics Support by @Vonng
pg_exporter: predicate queries feature by @ringerc
Do a clean build in the dockerfile by @ringerc
pg_exporter: don’t panic after “bind: address already in use” by @ringerc
pg_exporter: fix /stat endpoint formatting by @ringerc
pg_exporter: omit default query properties on yaml export by @ringerc
Exclude template DBs from discovery and schema-qualify discovery query by @ringerc
Fix some typos and some metric description mistakes by @ringerc
The proposed pgx driver migration (#52, @ringerc) was reverted before release. This tag uses lib/pq.
Added PgBouncer 1.23 metrics (source commit).
Corrected log caller attribution (#55, @ulysseskk).

PGCon.Dev 2024: The Week PostgreSQL Commits Paused

Vonng — Mon, 17 Jun 2024 00:00:00 +0000

Notes from PGCon.Dev 2024: extension packaging, observability, community discussions, and plans for PostgreSQL.

PG Exporter v0.6.1

Vonng — Fri, 26 Jan 2024 17:26:17 +0800

Changes

Updated golang.org/x/net from v0.10.0 to v0.17.0 and golang.org/x/crypto to v0.17.0 for security fixes (#38 covers x/crypto)
Fix connect-timeout propagation (#37), contributed by @mouchar

Checksums

The original release published MD5 checksums for its archives and packages:

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v0.6.1 · 2024-01-26

PostgreSQL Macro Query Optimization with pg_stat_statements

Nikolay Samokhvalov — Thu, 26 Oct 2023 00:00:00 +0000

Query optimization is one of the core responsibilities of DBAs. This article introduces how to use metrics provided by pg_stat_statements for macro-level PostgreSQL query optimization.

PG Exporter v0.6.0

Vonng — Wed, 18 Oct 2023 12:54:49 +0800

Changes

Updated dependencies to address reported vulnerabilities.
Added PostgreSQL 16 collectors and PostgreSQL 15 compatibility fixes (#35, @japinli).
Added ARM64 packages.
Removed the fixed monitor schema from pg_query queries. pg_stat_statements must be visible through search_path, such as when installed in public.
Accepted .yml as well as .yaml in configuration directories (#34, @japinli).
Changed PgBouncer version-parsing messages from info to debug level.
Added the missing relid column to pg_table_10_12.

v0.6.0 · 2023-10-18

Monitor Existing PostgreSQL with Pigsty: RDS, PolarDB, and Self-Hosted Databases

Vonng — Sun, 17 Sep 2023 00:00:00 +0000

Deploy Pigsty on ECS and connect existing PostgreSQL databases, using Alibaba Cloud PolarDB and RDS for PostgreSQL as examples.

PG Exporter v0.5.0

Vonng — Thu, 28 Apr 2022 07:27:37 +0800

Exporter changes

Used nFPM to build RPM and DEB packages.
Added column.default to substitute a value for NULL.
Added column.scale to scale numeric values, such as microseconds to seconds.
Fixed /stat output.
Added the pgsty/pg_exporter Docker image.

Collector changes

Converted time metrics to seconds in pg_wal, pg_query, pg_db, pg_bgwriter, pg_ssl, and pgbouncer_stat.
Moved pg_class metrics into pg_table and pg_index.
Enabled pg_table_size by default.

v0.5.0 · 2022-04-28

PG Exporter v0.4.1

Vonng — Tue, 08 Mar 2022 18:48:00 +0800

Changes

Excluded Citus and TimescaleDB internal schemas from object monitoring.
Removed duplicate pg_statio rows.
Added PgBouncer 1.16 support.
Fixed overlapping pg_repl collector branches on PostgreSQL 12.
Added -T, --connect-timeout, and PG_EXPORTER_CONNECT_TIMEOUT to control connection timeouts, including for remote targets.
Renamed the RPM configuration file from pg_exporter.yaml to pg_exporter.yml.

v0.4.1 · 2022-03-08

PG Exporter v0.4.0

Vonng — Mon, 12 Jul 2021 16:09:02 +0800

Changes

Added PostgreSQL 14 support.
Revised the default metric configuration while preserving support for older configuration files.
Added --auto-discovery, --include-database, and --exclude-database.
Added multi-database collection through automatic discovery.

v0.4.0 · 2021-07-12

Diagnose PostgreSQL slow queries

Vonng — Tue, 23 Feb 2021 00:00:00 +0000

Use query statistics, logs, and monitoring to find a slow query, test its cause, and verify a fix.

PG Exporter v0.3.2

Vonng — Mon, 01 Feb 2021 11:12:06 +0800

Changes

Fixed an edge case in redacted connection strings.
Corrected documentation and spelling errors.

v0.3.2 · 2021-02-01

The First Pigsty Release

Vonng — Wed, 13 Jan 2021 00:00:00 +0000

Introducing Pigsty’s first release: PostgreSQL monitoring, high-availability cluster provisioning, and a local demo environment.

PG Exporter v0.3.1

Vonng — Fri, 04 Dec 2020 17:27:21 +0800

Changes

Fixed default-configuration errors, especially on PostgreSQL versions below 13:

Restricted primary_conninfo collection to the supported collector branch.
Added funcid to pg_func labels to distinguish functions with the same name.
Corrected the program name in version output to pg_exporter.

v0.3.1 · 2020-12-04

Golden Monitoring Metrics: Errors, Latency, Throughput, Saturation

Vonng — Fri, 06 Nov 2020 00:00:00 +0000

Understanding the golden monitoring metrics in PostgreSQL

PG Exporter v0.3.0

Vonng — Thu, 29 Oct 2020 16:47:32 +0800

Changes

Updated the default configuration for PostgreSQL 13 metrics, including pg_slru, pg_shmem, pg_query13, and pg_backup.
Added HTTP endpoints for health and recovery-state checks.
Added a startup HTTP server that reports pg_up 0 until initialization finishes.
Added sslmode=disable when the connection URL omits sslmode.
Fixed bugs and spelling errors.

v0.3.0 · 2020-10-29

Introducing Pigsty, a PostgreSQL Monitoring System

Vonng — Sat, 30 May 2020 00:00:00 +0000

The PostgreSQL monitoring system I built: its architecture, monitoring hierarchy, instance and cluster dashboards, and slow-query analysis.

PostgreSQL's KPI

Vonng — Fri, 29 May 2020 00:00:00 +0000

PG Load measures accumulated transaction time per second, normalized by a chosen concurrency value. This article derives the metric and shows how to use it for alerting and capacity assessment.

PG Exporter v0.2.0

Vonng — Sat, 21 Mar 2020 19:10:25 +0800

Changes

Added RPM packages for YUM and a Linux service definition.
Added the skip option to query configuration.
Fixed pgbouncer_up.
Added configuration reload support.

v0.2.0 · 2020-03-21

PG Exporter v0.1.2

Vonng — Thu, 20 Feb 2020 15:12:29 +0800

Changes

Fixed pgbouncer_up.
Added dynamic configuration reload.
Removed shard-related logic.
Added a bulky mode to the default configuration.

v0.1.2 · 2020-02-20

PG Exporter v0.1.1

Vonng — Fri, 10 Jan 2020 01:30:28 +0800

Changes

Fixed a startup hang when a query failed.

v0.1.1 · 2020-01-10

PG Exporter v0.1.0

Vonng — Wed, 08 Jan 2020 21:10:42 +0800

Changes

The first stable release.

v0.1.0 · 2020-01-08

PG Exporter v0.0.5

Vonng — Wed, 08 Jan 2020 20:12:11 +0800

This is an early repository tag without a separate GitHub Release object. This archival note is based on the tag commit and historical release summary.

Changes

Add per-collector query timeouts
Replace the earlier skip_error behavior with the fatal collector policy
Revise collector priority semantics
Fix the built-in pg_up metric
Add documentation for each bundled collector

v0.0.5 · 2020-01-08

PG Exporter v0.0.4

Vonng — Fri, 20 Dec 2019 17:22:44 +0800

Changes

Tested across more than 200 production nodes for about two weeks.

v0.0.4 · 2019-12-20

PG Exporter v0.0.3

Vonng — Sat, 14 Dec 2019 00:03:23 +0800

Changes

Passed production testing while the project remained under active development.

v0.0.3 · 2019-12-14

PG Exporter v0.0.2

Vonng — Mon, 09 Dec 2019 20:43:23 +0800

Changes

An early version made available for trial use.

v0.0.2 · 2019-12-09

PG Exporter v0.0.1

Vonng — Mon, 09 Dec 2019 14:12:22 +0800

This early version has a Git tag but no separate GitHub Release. The note is based on the tag and historical release summary.

Changes

Added PgBouncer mode.

v0.0.1 · 2019-12-09

An Overview of PostgreSQL Monitoring

Vonng — Mon, 17 Dec 2018 00:00:00 +0000

A tour of a PostgreSQL monitoring system: dashboards, architecture, key metrics, and the statistics behind them.

Relation Bloat Monitoring and Management

Vonng — Sat, 06 Oct 2018 00:00:00 +0000

Estimate PostgreSQL table and index bloat from statistics, then use VACUUM FULL or pg_repack to reclaim space.

Monitoring Table Size in PostgreSQL

Vonng — Mon, 14 May 2018 00:00:00 +0000

Measure PostgreSQL table storage, including indexes, TOAST, and relation forks.

PostgreSQL Server Log Configuration

Vonng — Tue, 06 Feb 2018 00:00:00 +0000

CSV logs can be imported into PostgreSQL tables or queried through file_fdw for analysis.