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Prometheus 3.14 ships OCI service discovery and start-timestamp rate extrapolation

prometheuspromqlmonitoringobservabilitytsdbotlp
◆Current state
Prometheus is in steady maintenance and incremental feature mode across two active release tracks: 3.13 LTS and 3.14 stable. The 3.14.0 release adds Oracle Cloud Infrastructure service discovery, promotes duration expressions from feature-flagged to default, and introduces an experimental start_timestamp function that enables more accurate rate extrapolation. Recent cycles have also been heavy on security dependency updates and TSDB correctness fixes — the head-chunk cache bug in 3.13.1 was a real correctness risk for range queries after compaction.
◆Where it's heading
Prometheus is methodically expanding its service discovery surface (OCI joins the roster) while refining PromQL's precision for long-range and histogram queries. The start-timestamp work (experimental in 3.14) addresses a known limitation in rate extrapolation that has produced systematically off results in low-scrape-frequency setups. The histogram start-timestamp encoding feature, also experimental, suggests the team is working toward more consistent histogram behavior across the scrape lifecycle. OTLP integration continues to get hardening work — the label collision warning in 3.14 is a response to a real operational pain point for teams ingesting OTel data.
◆Prediction
The start-timestamp rate extrapolation feature will graduate from experimental in 3.15 if community feedback is positive — it's the kind of correctness improvement that gets adoption quickly once users verify it against their own data. OTLP improvements are likely to continue as OTel adoption grows and label sanitization edge cases surface.

◆Recent moves

  1. 9d ago

    3.13.3 / 2026-09-07

    A security patch release for the 3.13 LTS track, bumping compress and golang crypto dependencies and fixing six bugs: a Docker Swarm SD panic, a silent regex label matcher bug in PromQL, CPU spin on shutdown in both scrape manager and alerting, and two TSDB correctness fixes for out-of-order queries and deleted series. Routine maintenance, but the TSDB fixes are consequential for correctness.

    View source ↗
  2. 29d ago

    3.14.0 / 2026-08-17

    Prometheus 3.14.0 adds Oracle Cloud Infrastructure compute service discovery, promotes duration expressions to default (removing the feature flag), and introduces an experimental start_timestamp function that enables more accurate rate extrapolation from the scrape start rather than relying on extrapolation alone. The OTLP label collision warning is a useful operational addition for OTel ingestion setups. No behavioral regressions — a clean minor release.

    View source ↗
  3. 1mo ago

    Prometheus 3.14.0 Release Candidate

    The 3.14.0 release candidate, equivalent in content to the GA. Notable only as the publication point for the 3.14 changelog before formal release. The RC itself carries the same changes as 3.14.0 GA.

    View source ↗
  4. 1mo ago

    3.13.2 / 2026-07-29

    Security patch for the 3.13 LTS track, bumping golang text (CVE-2026-56852) and grpc dependencies, plus a PromQL preallocation fix. Dependency hygiene maintenance with no user-visible behavioral change.

    View source ↗
  5. 2mo ago

    3.13.1 / 2026-07-10

    A TSDB correctness fix for a bug where the head-chunk cache could return samples from the wrong chunk or produce spurious not-found errors on range queries after head-chunk truncation. For teams running high-churn metrics, this bug could produce silently incorrect range query results — fixing it is a meaningful reliability improvement on the 3.13 LTS track.

    View source ↗
  6. 2mo ago

    3.5.5 / 2026-07-09

    A security fix for the legacy 3.5 track, bumping the sanitize-html UI dependency to fix a cross-site scripting vulnerability (CVE-2026-53606). Purely a security maintenance release with no functional changes.

    View source ↗