Node Details

The Node Details page displays usage details of the node.

Note: To navigate to a certain section of the page, click the navigation tab at the top of the page.

Summary Panel

You can monitor the following metrics in the summary panel:

Metric	Description
Up Time	The time that the node is available and running.
CPU's	The number of CPUs in the node.
Total Memory	The total memory allocated to the node.
Memory Used %	The amount of memory used (in %).
CPU Used %	The amount of CPU used (in %).
Disk Used %	The amount of disk used (in %).
Applications	The number of applications running on the node.
Containers	The number of containers used in the node.
Queries	The number of queries in the node.
Daemons	The number of daemons.

Service Status

The service status icon denotes the status of the services running on the node. A notification of 1 indicates that one service is down on that node. Click the icon to know which service is down. For example, in the following image, the FlumeAgent is down and the other services are up and running.

Note: Node Refresh: Click this / button to toggle between Play and Pause. Click the Play button to refresh the node status every ten seconds. Click the Pause button to temporarily stop node refresh.

Charts

The following table provides the details of the metrics of the charts displayed in the Node Details page:

Metric	Description
CPU Usage	Displays the amount of CPU utilized by the node.
Memory Usage	Displays the amount of memory utilized by the node. You can view usage of the following memory types: Used Buffered Cached Free
IO Usage	The IO Usage charts describe the number of input bytes read and the number of output bytes written to a node. The following IO metrics are displayed: I/O Ops: The input/output operations per second. This chart displays the data for Read IOPS and Write IOPS. I/O Time: The time utilized by input/output operations. This chart displays Read Time and Write Time (in ms) of I/O operations in a node. I/O Bytes: The size of I/O operations. This chart displays the size of incoming and outgoing operations in the form of Read Bytes and Write Bytes. I/O Request Time: The time taken by I/O requests waiting in queue to execute. Note Click Show Per Mount Usage to view I/O usage on every mount in the node.
Network Usage per Second	This chart displays the network throughput measured for every second. You can monitor the following network statistics: Sent Bytes Received Bytes Note To view individual network usage statistics of processes in the node, click Show Individual. By default, the aggregated value is displayed.
Disk Usage	This chart displays the amount of disk used by the node in directories. The value is displayed in %. Hover the scale to view the disk usage.
Hadoop Application CPU and Memory Usage	This tile displays the top five memory-intensive and CPU-intensive processes running on a node, at the top and the charts display the amount of memory and CPU utilized by the processes in the node (in MB).
YARN Container Metrics	The YARN container metrics reflect the number of operating containers and the average launch duration time as a comparative line chart.
JVM GC Count	The chart displays the amount of GC memory used based on the following metrics: Resource manager Namenode Zookeeper Hbase master Hbase region server Hive server2 Hive metastore
JVM GC Time	The chart displays the GC time based on the following metrics: Resource manager Namenode Zookeeper Hbase master Hbase region server Hive server2 Hive metastore
Error & Fatal Logs	Error & Fatal Logs is a table that display all the errors that have occurred. It displays the Log Time and Message about the error. The Error & Fatal Logs tile displays the logs of any errors or unexpected behaviour on the node. The table stores the following column details: Log Time: The time at which the error was reported in the log. Message: The message associated with the error. Note Click the log icon to view all the Logs.

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