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@ -51,21 +51,6 @@ and <<docs-reindex,`reindex`>> APIs.
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TIP: If disk space is a concern, rather increase the
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TIP: If disk space is a concern, rather increase the
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<<index-codec,compression level>> instead of disabling the `_source`.
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<<index-codec,compression level>> instead of disabling the `_source`.
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.The metrics use case
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**************************************************
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The _metrics_ use case is distinct from other time-based or logging use cases
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in that there are many small documents which consist only of numbers, dates,
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or keywords. There are no updates, no highlighting requests, and the data
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ages quickly so there is no need to reindex. Search requests typically use
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simple queries to filter the dataset by date or tags, and the results are
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returned as aggregations.
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In this case, disabling the `_source` field will save space and reduce I/O.
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**************************************************
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[[include-exclude]]
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[[include-exclude]]
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==== Including / Excluding fields from `_source`
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==== Including / Excluding fields from `_source`
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