| From: | pg_hdr_histogram via PostgreSQL Announce <announce-noreply(at)postgresql(dot)org> |
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| To: | PostgreSQL Announce <pgsql-announce(at)lists(dot)postgresql(dot)org> |
| Subject: | pg_hdr_histogram 1.0.0 - exact percentiles in PostgreSQL |
| Date: | 2026-10-26 13:16:14 |
| Message-ID: | 179302057468.1250.3957676506682196015@wrigleys.postgresql.org |
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| Lists: | pgsql-announce |
**pg_hdr_histogram** is a PostgreSQL extension for exact-latency percentiles.
Most monitoring tools approximate percentiles from fixed buckets. pg_hdr_histogram
stores a full HDR histogram as a first-class type, so `p50` / `p99` / `p99.9` are
measurements (~0.1% relative precision over 6 orders of magnitude), not estimates —
and histograms merge losslessly across time windows and hosts.
- Built on HdrHistogram_c.
- Aggregates `hdr_add` and `hdr_merge`, parallel-safe, `trusted = true`.
- Author: Vladimir Pavliv.
Source: [https://github.com/vovcke/pg_hdr_histogram](https://github.com/vovcke/pg_hdr_histogram)
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