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Add warning on scripted metric aggregation's intermediate state memory usage. #119379

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Jan 28, 2025
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Add warning on scripted metric aggregation's intermediate state memory usage. #119379

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4 changes: 3 additions & 1 deletion docs/reference/aggregations/metrics/scripted-metric-aggregation.asciidoc
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Expand Up @@ -9,7 +9,9 @@ A metric aggregation that executes using scripts to provide a metric output.
WARNING: `scripted_metric` is not available in {serverless-full}.

WARNING: Using scripts can result in slower search speeds. See
<<scripts-and-search-speed>>.
<<scripts-and-search-speed>>. When using a scripted metric aggregation, its intermediate state is serialized
into an in-memory byte array for transmission to other nodes during the aggregation process.
Consequently, a complex scripted metric aggregation may also encounter the 2GB limitation imposed on Java arrays.

Example:

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