About health and performance of Redis

[sravs]

What metrics/parameters should be used for monitoring the health of redis process by monitoring tools ? 

What performance metrics should be monitored for performance of redis over time ?

In the sentinel setup, what metrics should be monitored for health of Sentinel process ?

What performance metrics should be monitored for performance of Sentinel over time ?

Any help would be appreciated.

Regards

[sravs]

I found the following to be a few important metrics for redis :

    1. total_commands_processed

    2. used_memory

        used_memory_rss 

        mem_fragmentation_ratio

    3. connected_clients 

    4. master_slave_io_seconds_ago

For sentinel : 

    1. sentinel ckquorum <master name>