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@ -43,3 +43,8 @@ Adjusting the sampling rate controls what percent of requests are traced.
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`1.0` means _all_ requests are traced. If you set the `TRANSACTION_SAMPLE_RATE` to a value below `1.0`,
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the agent will randomly sample only a subset of transactions.
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Unsampled transactions only record the name of the transaction, the overall transaction time, and the result.
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IMPORTANT: In a distributed trace, the sampling decision is propagated by the initializing Agent.
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This means if you're using multiple agents, only the originating service's sampling rate will be used.
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Be sure to set sensible defaults in _all_ of your agents, especially the
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{apm-rum-ref}/configuration.html#transaction-sample-rate[JavaScript RUM Agent].
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