https://pizza.rs/tags/extended_stats/Recent content in Extended_stats on INFINI PizzaHugoenhttps://pizza.rs/docs/references/aggregation/metric/extended-stats/Mon, 01 Jan 0001 00:00:00 +0000https://pizza.rs/docs/references/aggregation/metric/extended-stats/<h1 id="extended-stats-aggregation"> Extended stats aggregation <a class="anchor" href="#extended-stats-aggregation">#</a> </h1> <p>A multi-value metrics aggregation extending <a href="https://pizza.rs/docs/references/aggregation/metric/stats/"><code>stats</code></a> with squares, variance, standard deviation and their lower/upper bounds. Where <code>stats</code> says what the values are, <code>extended_stats</code> says how tightly they cluster around the mean — the input for outlier bands, quality gates and anything else built on &ldquo;how unusual is this value&rdquo;.</p> <h2 id="how-it-works"> How it works <a class="anchor" href="#how-it-works">#</a> </h2> <p>The engine walks the matching documents once, maintaining a running <code>count</code>, <code>sum</code>, <code>sum_of_squares</code>, minimum and maximum — the same single pass as <code>stats</code>, plus one multiply-add for the squares. Everything downstream is derived from these raw moments, and is exact (no sampling, no sketches):</p>