Monitor the performance of hosts in an instance

This topic describes how to monitor the performance of hosts in an instance by using OceanBase Cloud.

Procedure

1. Log in to the OceanBase Cloud console.

2. In the left-side navigation pane, click Instances.

3. On the Instances page, click the name of the target instance to go to the Overview page of the instance.

4. In the left-side navigation pane of the Overview page of the instance, click Metrics.

5. On the Metrics page, click the Hosts tab.

6. By default, the Hosts tab shows the monitoring data of all nodes in the instance 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

     Metric	Metric Name	Unit	Description
     System Load	load1	-	The average CPU load in the last 1 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 data received per second.
     Data Sent Per Second	net_send	MiB	The data sent per second.
     Disk Usage	ob_data_disk_used_size	GiB	The data disk usage of the node.

   • Disk and I/O

     Metric	Metric Name	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 Required Size	ob_data_required_size	GiB	The data required size.
     OB Log Disk IOPS	ob_clog_io	times/s	The average IOPS of the OB log disk.
     OB Log Disk Average I/O Time	ob_clog_io_time	μs	The average I/O time 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 I/O 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 Time	ob_data_io_time	μs	The average I/O time 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 I/O 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. This metric is available only for clusters created in Alibaba Cloud, Huawei Cloud, or AWS.
     OB Host IOPS	ob_host_real_time_iops	times/s	The IOPS of the OB host. This metric is available only for clusters created in Alibaba Cloud, Huawei Cloud, or AWS.
     OB Host Throughput	ob_host_real_time_throughput	MiB/s	The throughput of the OB host. This metric is available only for clusters created in Alibaba Cloud, Huawei Cloud, or AWS.
     OB Host I/O Usage	ob_host_iops_used_percent	%	The I/O usage of the OB host. This metric is available only for clusters created in Alibaba Cloud, Huawei Cloud, or AWS.
     OB Host Throughput Usage	ob_host_throughput_used_percent	%	The throughput usage of the OB host. This metric is available only for clusters created in Alibaba Cloud, Huawei Cloud, or AWS.

   • System health and availability

     Metric	Metric Name	Unit	Description
     NTP Offset	ntp_offset_milliseconds	ms	The NTP offset.
     Uptime	uptime	s	The total service time of the cluster.
     OB Process Status	ob_process_exists	-	The status of the OceanBase process on the node.