About setting up retention policy for the metrics data on my dashboard

Hello all,
I’ve been configuring to see how can I extend the retention period for the metrics data that sent over to my dashboard.

I attempt to change the retention period to 3 months as below.

But I still couldn’t manage to see the metrics kept for 3 months - it still keeps for 15 days only.

Can I please ask how to achieve for seeing the metrics data for 3 months and if my retention setup is correct under prometheus.service config file?

Please advise, many thanks. :slight_smile: