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carsonip merged 3 commits into from
Jul 8, 2025
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apm: Document apm-server.sampling.tail.ttl #4914

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Document apm-server.sampling.tail.ttl
carsonip Jul 4, 2025
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Update docs/en/observability/apm/configure/sampling.asciidoc
carsonip Jul 7, 2025
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Update docs/en/observability/apm/configure/sampling.asciidoc
carsonip Jul 7, 2025
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12 changes: 12 additions & 0 deletions docs/en/observability/apm/configure/sampling.asciidoc
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Expand Up @@ -76,6 +76,18 @@ Default: `3GB`. (text)
| Fleet-managed | `Storage limit`
|====

[float]
[id="sampling-tail-ttl-{input-type}"]
=== TTL
Time-to-live (TTL) for trace events stored in the local storage of the APM Server during tail-based sampling. This TTL determines how long trace events are retained in the local storage while waiting for a sampling decision to be made. A greater TTL value increases storage space requirements. Should be at least 2 * Interval.
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Default: `30m` (30 minutes). (duration)

|====
| APM Server binary | `sampling.tail.ttl`
| Fleet-managed (version 8.19+) | `TTL`
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|====

// end::tbs-top[]

[float]
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