Note: For a quick overview, check the query ops and latency graphs as well as the CPU, memory, disk, and network usage graphs. In case of dips or spikes the other graphs will offer additional information that can help diagnose the issue.
In case of issues, more information about each Master or TServer is available on its respective Details page.
Generally the link is:
<node-ip>:7000 for Masters and
<node-ip>:9000 for TServers.
Note that in some setups these links may not be accessible, depending on the configuration of your on-premises datacenter or cloud-provider account. To fix this, read more here.