https://pizza.rs/tags/sampler/Recent content in Sampler on INFINI PizzaHugoenhttps://pizza.rs/docs/references/aggregation/bucket/sampler/Mon, 01 Jan 0001 00:00:00 +0000https://pizza.rs/docs/references/aggregation/bucket/sampler/<h1 id="sampler-aggregation"> Sampler aggregation <a class="anchor" href="#sampler-aggregation">#</a> </h1> <p>A single-bucket aggregation that keeps only a sample of the matching documents before running its sub-aggregations — used to cut aggregation cost on very large result sets. If a <code>terms</code> aggregation over millions of documents is too slow or too memory-hungry, sampling trades exact counts for an order-of-magnitude answer at a fraction of the cost.</p> <h2 id="how-it-works"> How it works <a class="anchor" href="#how-it-works">#</a> </h2> <p>The sampler keeps the first <code>shard_size</code> matching documents (default <code>100</code>) and discards the rest; its sub-aggregations then run over that sample only. The result is a single bucket keyed <code>sample</code>, carrying the sample&rsquo;s <code>doc_count</code> and the sub-aggregation results:</p>