# Cluster monitoring¶

This topic introduces node monitoring, service monitoring, graph space monitoring, and TV Dashboard.

At the top navigation bar of the Dashboard Enterprise Edition page, click Cluster Management, and click Detail at the right of the target cluster. Monitoring at the left navigation bar contains Node, Service and TV Dashboard.

## Node¶

Click Monitoring->Node->Overview to enter the node monitoring overview page.

On this page, you can view the variation of CPU, Memory, Load, Disk, and Network In/Out quickly.

• By default, you can view the monitoring data of the maximum of 14 days. You can also select a time range or quickly select latest 1 hour, 6 hours, 12 hours, 1 day, 3 days, 7days, or 14 days.
• By default, you can view the monitoring data of all the instances in clusters. You can select the instances you want to view in the instance box.
• By default, the monitoring information page will not be updated automatically. You can set the update frequency of the monitoring information page globally or click the button to update the page manually.
• To set a base line, click the button.
• To view the detailed monitoring information, click the button. In this example, select Load for details. The figure is as follows.

• You can set the monitoring time range, instance, update frequency and base line.
• You can search for or select the target metric. For details about monitoring metrics, see Monitor parameter.
• You can temporarily hide nodes that you do not need to view.
• You can click the button to view the detailed monitoring information.

## Service¶

Click Monitoring->Service->Overview to enter the service monitoring overview page.

On this page, you can view the information of Graph, Meta, and Storage services quickly. In the upper right corner, the number of normal services and abnormal services will be displayed.

Note

In the current Service page of the Enterprise Edition, only two monitoring metrics can be set for each service, which can be adjusted by clicking the Set up button.

• By default, you can view the monitoring data of the maximum of 14 days. You can also select a time range or quickly select latest 1 hour, 6 hours, 12 hours, 1 day, 3 days, 7days, or 14 days.
• By default, you can view the monitoring data of all the instances in clusters. You can select the instances you want to view in the instance box.
• By default, the monitoring information page will not be updated automatically. You can set the update frequency of the monitoring information page globally or click the button to update the page manually.
• You can view the status of all the services in cluster.
• To view the detailed monitoring information, click the button. In this example, select Graph for details. The figure is as follows.

• You can set the monitoring time range, instance, update frequency, period, aggregation and base line.
• You can search for or select the target metric. For details of monitoring metrics, see Monitor parameter.
• You can temporarily hide nodes that you do not need to view.
• You can click the button to view the detailed monitoring information.
• The Graph service supports a set of space-level metrics. For more information, see the following section Graph space.

### Graph space¶

Note

Before using graph space metrics, you need to set enable_space_level_metrics to true in the Graph service. For details, see Update config.

Space-level metric incompatibility

If a graph space name contains special characters, the corresponding metric data of that graph space may not be displayed.

The service monitoring page can also monitor graph space level metrics. Only when the behavior of a graph space metric is triggered, you can specify the graph space to view information about the corresponding graph space metric.

Space graph metrics record the information of different graph spaces separately. Currently, only the Graph service supports a set of space-level metrics.

For information about the space graph metrics, see Space graph.

## TV Dashboard¶

The TV Dashboard feature helps users understand the health status of the cluster and the information of services and nodes at a glance.

Click Monitoring->TV Dashboard to enter the TV Dashboard page.

Screen area Information displayed
Upper middle area 1. The health degree of your cluster. The system scores the health of your cluster. For more information, see the following note.
2. The information and number of running nodes, the number of running services and abnormal services in the cluster.
3. CPU and memory usage of the node at the current time.
Lower middle area Monitoring information of 4 Graph service metrics at different periods. The 4 metrics are:
1. num_active_sessions
2. num_slow_queries
3. num_active_queries
4. num_query_errors
Left side of the area 1. QPS (Query Per Second) of your cluster.
2. The monitoring information of 2 Storage service metrics at different periods. The two metrics are: add_edges_latency_us,add_vertices_latency_us.
Right side of the area The node-related metrics information at different periods. Metrics include:
1. cpu_utilization
2. memory_utilization
5. disk_writebytes

• Except for the appearance of the first emergency level alert that deducts 40 points, 10 points are deducted for each of the other emergency level alerts and other levels of alerts.