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draft of summary note (#29308)
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‎content/en/real_user_monitoring/rum_without_limits/_index.md

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@@ -26,6 +26,8 @@ RUM without Limits provides you flexibility over your RUM sessions volumes by de
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Even if you retain only a fraction of your sessions, Datadog provides [performance metrics][1] for all ingested sessions. This ensures an accurate, long-term overview of application health and performance, even if only a fraction of session data is retained.
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**Note**: In RUM without Limits mode, you can only use default filters on the [Performance Monitoring Summary page][7]. This lets you see the entire dataset and prevents skewed performance metrics since the data is sampled and there are fewer tags available than in event attributes.
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This page identifies key components of RUM without Limits that can help you manage your RUM sessions volumes within your observability budget.
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### For new applications
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On mobile applications, many concurrent versions can live together. However, existing versions are not necessarily sending 100% of sessions, which means that creating new retention filters reduces the data available in Datadog for these application versions.
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Datadog recommends creating the same retention filters for all application versions, independently of whether the SDK sampling rate is set to 100% or not. Ultimately, all valuable sessions will still end up being collected even if some sessions are not ingested for some older versions.
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Datadog recommends creating the same retention filters for all application versions, independently of whether the SDK sampling rate is set to 100% or not. Ultimately, all valuable sessions are still collected even if some sessions are not ingested for some older versions.
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See suggested retention filters and use cases in [Retention Filter Best Practices][5].
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@@ -99,3 +101,4 @@ Create and configure [retention filters][6].
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[4]: https://app.datadoghq.com/rum/list
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[5]: /real_user_monitoring/guide/retention_filter_best_practices/
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[6]: /real_user_monitoring/rum_without_limits/retention_filters
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[7]: https://app.datadoghq.com/rum/performance-monitoring

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