Disk Space Utilization - Remote Collector

Navigate to Discovery > Remote Collectors and click on the remote collector which has disk space issue and edit its settings, there is an option under InfluxDB tab:

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Please enable the Auto-clear option and monitor if the warning message disappears. (it may take some time)

You can also clear logs from the RC console.

Starting in version 17.08+

You can now easily clear Remote Collector log files from the Remote Collector list page rather than having to use the Collector’s console. Select Discovery > Remote Collectors from the main menu to display the list page, select the remote collector you want, and then select Clear logs from the Actions menu.