Release Notes

• 1: PG Exporter v1.4.1
• 2: PG Exporter v1.4.0
• 3: PG Exporter v1.3.0
• 4: PG Exporter v1.2.2
• 5: PG Exporter v1.2.1
• 6: PG Exporter v1.2.0
• 7: PG Exporter v1.1.2
• 8: PG Exporter v1.1.1
• 9: PG Exporter v1.1.0
• 10: PG Exporter v1.0.3
• 11: PG Exporter v1.0.2
• 12: PG Exporter v1.0.1
• 13: PG Exporter v1.0.0
• 14: PG Exporter v0.9.0
• 15: PG Exporter v0.8.1
• 16: PG Exporter v0.8.0
• 17: PG Exporter v0.7.1
• 18: PG Exporter v0.7.0
• 19: PG Exporter v0.6.1
• 20: PG Exporter v0.6.0
• 21: PG Exporter v0.5.0
• 22: PG Exporter v0.4.1
• 23: PG Exporter v0.4.0
• 24: PG Exporter v0.3.2
• 25: PG Exporter v0.3.1
• 26: PG Exporter v0.3.0
• 27: PG Exporter v0.2.0
• 28: PG Exporter v0.1.2
• 29: PG Exporter v0.1.1
• 30: PG Exporter v0.1.0
• 31: PG Exporter v0.0.5
• 32: PG Exporter v0.0.4
• 33: PG Exporter v0.0.3
• 34: PG Exporter v0.0.2
• 35: PG Exporter v0.0.1

1 - PG Exporter v1.4.1

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

2 - PG Exporter v1.4.0

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.

Checksums

SHA256 checksums

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3 - PG Exporter v1.3.0

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

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4 - PG Exporter v1.2.2

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

Checksums

SHA256 checksums

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5 - PG Exporter v1.2.1

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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6 - PG Exporter v1.2.0

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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7 - PG Exporter v1.1.2

Fixed the pg_timeline configuration and updated Go dependencies.

Checksums

SHA256 checksums

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8 - PG Exporter v1.1.1

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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9 - PG Exporter v1.1.0

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

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10 - PG Exporter v1.0.3

• 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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11 - PG Exporter v1.0.2

• 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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12 - PG Exporter v1.0.1

• 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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57da7a8005cdf91ba8c1fb348e0d7367  pg-exporter_1.0.1_arm64.deb

13 - PG Exporter v1.0.0

Changes

Added PostgreSQL 18 collector branches:

Checksums

MD5 checksums published in the GitHub Release:

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eba8426b2cf50a58db5353562727004a  pg_exporter-1.0.0-1.x86_64.rpm
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14 - PG Exporter v0.9.0

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

15 - PG Exporter v0.8.1

Changes

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

16 - PG Exporter v0.8.0

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

17 - PG Exporter v0.7.1

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

18 - PG Exporter v0.7.0

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).

19 - PG Exporter v0.6.1

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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75b57566838c38092a9c45531c031561  pg_exporter-v0.6.1.darwin-arm64.tar.gz
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b3c9f2edd28810cae81cd0edad9eae5d  pg_exporter-0.6.1-1.x86_64.rpm

20 - PG Exporter v0.6.0

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.

21 - PG Exporter v0.5.0

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.

22 - PG Exporter v0.4.1

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.

23 - PG Exporter v0.4.0

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.

24 - PG Exporter v0.3.2

Changes

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

25 - PG Exporter v0.3.1

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.

26 - PG Exporter v0.3.0

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.

27 - PG Exporter v0.2.0

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.

28 - PG Exporter v0.1.2

Changes

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

29 - PG Exporter v0.1.1

Changes

• Fixed a startup hang when a query failed.

30 - PG Exporter v0.1.0

Changes

The first stable release.

31 - PG Exporter v0.0.5

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

32 - PG Exporter v0.0.4

Changes

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

33 - PG Exporter v0.0.3

Changes

Passed production testing while the project remained under active development.

34 - PG Exporter v0.0.2

Changes

An early version made available for trial use.

35 - PG Exporter v0.0.1

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.