Sampler aggregation #

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.

Example #

Sample 60 documents, then count types inside the sample:

Parameters for sampler #

• shard_size
  (Optional, integer, default: 100000) Sample size per shard.
• aggs
  (Optional, object) Sub-aggregations computed over the sample.