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# System Configuration

 __System Configuration__ displays the default storage time of metrics, logs, traces and the default Apdex threshold.

1. Click the right navigation bar and select __System Configuration__ .

     

2. Currently only supports modifying the storage duration of historical alerts, click __Edit__ to enter the target duration.

     When the storage duration is set to "0", the historical alerts will not be cleared.

     

!!! note

     To modify other configurations, please click to view [How to modify the system configuration? ](modify-config.md)