This topic describes how to monitor the performance of hosts in a cluster by using OceanBase Cloud.
Procedure
Log in to the OceanBase Cloud console.
In the left-side navigation pane, click Instances.
On the Instances page, click the name of the target instance to go to the Overview page of the instance.
In the left-side navigation pane of the Overview page of the instance, click Metrics.
On the Metrics page, click the Hosts tab.
By default, this tab shows the monitoring data of all nodes in the last hour.
- You can select a node from the Node drop-down list to view its monitoring data. If you select multiple nodes, you can click node names in a chart to filter the data to view.
- You can also specify a time period to filter the data to view.
The following table describes the performance metrics.
* System resources
| Monitoring item | Metric | Unit | Description |
|----------|---------|-----|----------|
| System load | load1 | % | The average CPU load in the last minute. |
| CPU usage | cpu_percent | % | The CPU usage. |
| Memory usage | memory_percent | % | The memory usage. |
| Network throughput | net_throughput | MiB | The network throughput. |
| Data received per second | net_recv | MiB | The amount of data received per second. |
| Data sent per second | net_send | MiB | The amount of data sent per second. |
* Disks and I/O
| Monitoring item | Metric | Unit | Description |
|----------|---------|-----|----------|
| OB data disk usage | ob_data_disk_percent | % | The data disk usage of the node. |
| OB log disk usage | ob_clog_disk_percent | % | The log disk usage of the node. |
| Data disk usage | ob_data_disk_used_size | GiB | The data disk usage of the node. |
| Data size | ob_data_required_size | GiB | The data size. |
| OB log disk IOPS | ob_clog_io | times/s | The average IOPS of the OB log disk. |
| OB log disk average I/O latency | ob_clog_io_time | ms | The average I/O latency of the OB log disk. |
| OB log disk throughput | ob_clog_io_byte | MiB | The average throughput of the OB log disk. |
| OB log disk utilization | ob_clog_io_util | % | The I/O utilization of the OB log disk. |
| OB log disk I/O usage | obcloud.metric_chart.host.log_disk_io_util_percent | % | The I/O usage of the OB log disk. |
| OB data disk IOPS | ob_data_io | times/s | The average IOPS of the OB data disk. |
| OB data disk average I/O latency | ob_data_io_time | ms | The average I/O latency of the OB data disk. |
| OB data disk throughput | ob_data_io_byte | MiB | The average throughput of the OB data disk. |
| OB data disk utilization | ob_data_io_util | % | The I/O utilization of the OB data disk. |
| OB data disk I/O usage | obcloud.metric_chart.host.data_disk_io_util_percent | % | The I/O usage of the OB data disk. |
| OB data disk throughput utilization | obcloud.metric_chart.host.data_disk_throughput_util_percent | % | The throughput utilization of the OB data disk. |
| OB host IOPS | ob_host_real_time_iops | count | The real-time IOPS of the OB host. |
| OB host throughput | ob_host_real_time_throughput | MiB/s | The real-time throughput of the OB host. |
| OB host I/O usage | ob_host_iops_used_percent | % | The I/O usage of the OB host. |
| OB host throughput utilization | ob_host_throughput_used_percent | % | The throughput utilization of the OB host. |
* System health and availability
| Monitoring item | Metric | Unit | Description |
|----------|---------|-----|----------|
| NTP offset | ntp_offset_milliseconds | ms | The NTP offset. |
| Uptime | uptime | s | The uptime. |
| OB process status | ob_process_exists | - | The status of the OB process. |