Performance
Performance real-time monitoring can track and record the performance indicators of the MongoDB database system in real time. Through real-time monitoring, administrators can discover potential performance problems in a timely manner and take corresponding measures for optimization to ensure that the database system can continue to run efficiently.
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Select your cluster and cluster nodes 
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Click Real-time Diagnosis  
Monitoring comparison
You can view the comparison of monitoring indicators of different nodes in a cluster.

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Click Monitor Comparison 
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You can choose the time range, node and indicator type for monitoring  