SigNoz is an open-source APM. It helps developers monitor their applications & troubleshoot problems, an open-source alternative to DataDog, NewRelic, etc.

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How mcuh data you have in the cluster and what is extra room in terms of CPU/RAM you have in your SIgNoz Deployment? Generally changing retention is a high resource consuming operation - hence it is recommended to have more resource available when you are doing this

<https://signoz.io/docs/userguide/retention-period/#recommendations-for-setting-retention-period>