# Which CSS Metrics Should I Focus On?

Disk usage and cluster health status are two key metrics that you can focus on. You can log in to Cloud Eye and configure alarm rules for these metrics. If alarms are reported, handle them by taking appropriate measures. For details about how to configure alarms, see Creating Alarm Rules.

Configuration examples:

- Alarms are reported if the disk usage is higher than or equal to a specified value (for example, 85%) and has reached this value multiple times (for example, 5 times) within a specified time period (for example, 5 minutes).
- Alarms are reported if the value of the cluster health status metric exceeds 0 for multiple times (for example, 5 times) within a specified time period (for example, 5 minutes).

Measures:

- If disk usage alarms are reported, view available disk space, check whether data can be deleted from cluster nodes or archived to other systems to free up space, or check if you can expand the disk capacity.
- If cluster health status alarms are reported, check whether shard allocation is normal, whether shards have been lost, and check whether the process has been restarted on Cerebro.

Parent topic: FAQs