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@@ -130,9 +130,12 @@ Groups and stores <<number,numeric>> field values based on a provided interval.
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[%collapsible%open]
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======
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`fields`::
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-(Required*, array of strings)
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-Array of <<number,numeric>> fields to group. If you specify a `histogram`
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-object, this property is required.
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+(Required*, string or array of strings)
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+<<number,Numeric>> fields to group. If you specify a `histogram` object, this
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+property is required.
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++
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+WARNING: Do not use the same fields in `histogram` and `metrics`. If you specify
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+the same field in both `histogram` and `metrics`, the rollup attempt will fail.
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`interval`::
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(Required*, integer)
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@@ -149,9 +152,9 @@ Stores values for <<keyword,keyword family>> and <<number,numeric>> fields.
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[%collapsible%open]
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======
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`fields`::
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-(Required*, array of strings)
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-Array of <<keyword,keyword family>> and <<number,numeric>> fields to store. If
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-you specify a `terms` object, this property is required.
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+(Required*, string or array of strings)
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+<<keyword,Keyword family>> and <<number,numeric>> fields to store. If you
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+specify a `terms` object, this property is required.
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+
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TIP: Avoid storing high-cardinality fields. High-cardinality fields can greatly
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increase the size of the resulting rollup index.
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@@ -159,7 +162,7 @@ increase the size of the resulting rollup index.
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=====
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`metrics`::
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-(Required, array of objects)
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+(Required, object or array of objects)
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Collects and stores metrics for <<number,numeric>> fields. You must specify at
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least one `metrics` object.
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+
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@@ -169,10 +172,13 @@ least one `metrics` object.
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`field`::
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(Required, string)
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<<number,Numeric>> field to collect metrics for.
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++
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+WARNING: Do not use the same fields in `histogram` and `metrics`. If you specify
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+the same field in both `histogram` and `metrics`, the rollup attempt will fail.
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`metrics`::
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-(Required, array of strings)
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-Array of metrics to collect. Each value corresponds to a
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+(Required, string or array of strings)
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+Metrics to collect. Each value corresponds to a
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<<search-aggregations-metrics,metric aggregation>>. Valid values are
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<<search-aggregations-metrics-min-aggregation,`min`>>,
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<<search-aggregations-metrics-max-aggregation,`max`>>,
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James Rodewig