Viewing the HetuEngine Instance Monitoring Page

Procedure

1. Log in to FusionInsight Manager as an administrator who can access the HetuEngine web UI and choose Cluster > Name of the desired cluster > Services > HetuEngine. The HetuEngine service page is displayed.
2. In the Basic Information area on the Dashboard tab page, click the link next to HSConsole WebUI. The HSConsole page is displayed.
3. Click Compute Instance then the tenant name corresponding to the instance to which operations are to be performed.
4. Click LINK in the WebUI column to access the compute instance task monitoring page. If you access the CLUSTER OVERVIEW page for the first time, you can view information on the compute instance task monitoring page.

   Table 1 Metric description

   Metric	Description
   Running Queries	Indicates the number of tasks concurrently executed on the current instance.
   Active Workers	Indicates the number of valid worker nodes on the current instance.
   ROWS/SEC	Indicates the number of data rows processed by the current instance per second.
   Queued Queries	Indicates the number of tasks to be executed in the waiting queue on the current instance.
   RUNNABLE DRIVERS	Indicates the number of running drivers on the current instance.
   BYTES/SEC	Indicates the amount of data read from the current instance per second.
   Blocked Queries	Indicates the number of blocked tasks on the current instance.
   RESERVED MEMORY (B)	Indicates the memory occupied by running tasks on the current instance.
   WORKER PARALLEISM	Indicates the average CPU time slice used by each worker on the current instance per second.
   Avg CPU cycles per worker	Indicates the average CPU cycles of each worker node of the current instance.

5. Filter query tasks by State on the QUERY DETAILS page.

   Table 2 State description

   State	Description
   Running	Views running tasks.
   Queued	Views the tasks to be executed in the waiting queue.
   Finished	Views the finished tasks.
   Failed	Views failed tasks, which can be filtered by failure cause.

6. Click a task ID to view the basic information, resource usage, stages, and tasks. For a failed task, you can view related logs on the detail query page.
   Figure 1 Viewing task details
   
   Figure 2 Task resource utilization summary
   
   Figure 3 Stages
   

   Table 3 Stages monitoring information

   Monitoring Item	Description
   SCHEDULED TIME SKEW	Indicates the scheduled time of the concurrent tasks on a node in the current stage.
   CPU TIME SKEW	Indicates whether concurrent tasks have computing skew in any stage phase.

   Figure 4 Tasks (Clicking the triangle on the right of each stage to view the tasks)
   

   Table 4 Tasks monitoring items

   Monitoring Item	Description
   ID	Indicates the ID of the task that is concurrently executed in multiple phases. The format is Stage ID:Task ID.
   Host	Indicates the Worker node where the current task is being executed.
   State	Indicates the task execution status, including PLANNED, RUNNING, FINISHED, CANCELED, ABORTED, and FAILED.
   Rows	Indicates the total number of data records read by a task. The unit is thousand (k) or million (M). By analyzing the number of data records read by different tasks in the same stage, you can quickly determine whether data skew occurs in the current task.
   Rows/s	Indicates the number of data records read by a task per second. By analyzing the number of data records read by different tasks in the same stage, you can quickly determine whether the network bandwidth of the node is different and whether the node NIC is faulty.
   Bytes	Indicates the data volume read by a task.
   Bytes/s	Indicates the data volume read by a task per second.
   Elapsed	Indicates the task execution duration.
   CPU Time	Indicates the CPU time used by a task.
   Mem	Task memory
   Peak Mem	Peak memory usage of tasks

7. Click the "Host" link to view the task resource usage of each node.
   Figure 5 Resource usage of the Task node
   

   Table 5 Monitoring metrics of node resources

   Name	Description
   Node ID	Indicates the host ID.
   Heap Memory	Indicates the maximum heap memory size.
   Processors	Indicates the number of processors.
   Uptime	Indicates the running duration.
   External Address	Indicates the external IP address.
   Internal Address	Indicates the internal IP address.
   Process CPU Utilization	Indicates the physical CPU utilization.
   System CPU Utilization	Indicates the system CPU utilization.
   Heap Utilization	Indicates the heap memory utilization.
   Non-Heap Memory Used	Indicates the non-Heap memory size.
   Memory Usage Pool	Indicates the memory pool size of the current Worker node.