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[apm]: Document sampling.tail.discard_on_write_failure config #4908

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merged 4 commits into from
Jul 9, 2025
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[apm]: Document sampling.tail.discard_on_write_failure config #4908

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[apm]: Document sampling.tail.discard_on_write_failure config
isaacaflores2 Jun 27, 2025
13637d4
[apm]: Add changes to storage limit behavior based on the Discard On …
isaacaflores2 Jul 1, 2025
1b981f2
remove 8.19 version since it is not needed
isaacaflores2 Jul 7, 2025
97193ab
Merge branch '8.x' into tbs-config-discard-on-write
isaacaflores2 Jul 9, 2025
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14 changes: 14 additions & 0 deletions docs/en/observability/apm/configure/sampling.asciidoc
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Expand Up @@ -76,6 +76,20 @@ Default: `3GB`. (text)
| Fleet-managed | `Storage limit`
|====

[float]
[id="sampling-tail-discard_on_write_failure-{input-type}"]
=== Discard On Write Failure
Defines the indexing behavior when trace events fail to be written to storage (for example, when the storage limit is reached).
When set to `false`, traces bypass sampling and are always indexed, which significantly increases the indexing load.
When set to `true`, traces are discarded, causing data loss which can result in broken traces.

Default: `false`. (bool)

|====
| APM Server binary | `sampling.tail.discard_on_write_failure`
| Fleet-managed (version 8.19+) | `Discard On Write Failure`
|====

// end::tbs-top[]

[float]
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