Visualize Network Metrics
The Network Charts in Pulse display real-time data transfer and connection metrics for ClickHouse servers.
Use these charts to:
- Monitor network throughput and data transfer performance.
- Track active client connections and identify saturation points.
- Detect connection rejections or network bottlenecks early.
- Ensure consistent ClickHouse connectivity and cluster stability.
Steps
- In the Pulse UI, go to ClickHouse > Dashboard.
- On the ClickHouse page, select the Network tab.
- Set a time range and data refresh interval (for example, 10 s, 20 m, 2 h, 4 d, or 1 w) to focus on relevant and up-to-date data.
Pulse then displays the network charts, which provide insights into network utilization, client connections, and server load.
Charts
| Chart | Description |
|---|---|
| Network Send Throughput | Represents the rate of data being transmitted (bytes per second) over the network interface. This metric helps identify outgoing data volume and bandwidth utilization. |
| Network Receive Throughput | Represents the rate of incoming network traffic (bytes per second) received on the network interface. Useful for tracking inbound data flow and network load. |
| HTTP Connections | Tracks the current number of open HTTP connections to the ClickHouse server. Each connection represents a client—such as Pulse, Prometheus, or another application—communicating with ClickHouse over HTTP. |
| TCP Connections | Displays the current number of active TCP client connections to the ClickHouse server using the native protocol, reflecting active client sessions or workloads. |
| HTTP Rejected Connections | Tracks the number of HTTP connection attempts rejected, usually due to reaching the configured connection limit or resource constraints. |
| TCP Rejected Connections | Tracks the number of TCP connection attempts rejected, often when the server reaches its maximum allowed client connections. |
Key Features
Each chart includes the following options and actions:
- Show Anomaly Detection: Displays deviations from the normal pattern based on historical data.
- Tip: Refer to the chart description for more details.
- Refresh: Updates the chart to display the latest available data.
- Maximize: Expands the chart for a full-page view.
- Download: Exports the chart data in .xlsx or .csv format.
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