Multiple Nodes with a Single Metric

Procedure

1. Log in to the DAS console.
2. Click in the upper left corner and select a region and project.
3. Click in the upper left corner, and under Databases, click Data Admin Service.
4. In the navigation pane, choose Intelligent O&M > Instance List.

   Alternatively, on the Overview page, click Go to Intelligent O&M.

5. In the upper right corner of the Instance List page, search for instances by engine type, instance name, or instance IP.
   Figure 1 Searching for instances
   

6. Select the instance whose metrics you want to view and click Details.
7. Choose Performance > Multiple Nodes with Single Metric.
8. Click Select Node to select instances.
   

   You can select a maximum of five nodes of the same type.

9. Click Select Metric and select the instance metrics to display.

   Table 1 Node metrics

   Category	Metric	Description
   CPU	CPU Usage	CPU usage of the monitored object (Unit: %)
   	CPU Load	Average CPU load over the past 1, 5, and 15 minutes. The value is obtained using the w command.
   	CPU Load in Past 1 Minute	Average CPU load over the past 1 minute. The value is obtained using the w command.
   Memory	Memory Usage	Memory usage of the monitored object (Unit: %)
   	Available Memory	Memory available to the operating system (Unit: GB)
   Network	Data Transfer In	Average number of bytes sent by the VM of the monitored object in a measurement period (Unit: KB/s)
   	Data Transfer Out	Average number of bytes received by the VM of the monitored object in a measurement period (Unit: KB/s)
   Disk Usage	System Disk Usage	Real-time larger value between usages of disks / and /var/log on the monitored node (Unit: %)
   	Used Disk Space	Real-time data disk usage of the monitored node. For GaussDB Distributed, the disk in /var/chroot/var/lib/engine/data of data nodes is monitored, and the disk in /var/chroot/usr/local of other nodes is monitored. For GaussDB Centralized, only data disks of data nodes are monitored. (Unit: GB)
   	Total Disk Space	Real-time total data disk size of the monitored node. For GaussDB Distributed, the disk in /var/chroot/var/lib/engine/data of data nodes is monitored, and the disk in /var/chroot/usr/local of other nodes is monitored. For GaussDB Centralized, only data disks of data nodes are monitored. (Unit: GB)
   	Disk Usage	Real-time data disk usage on the monitored instance For GaussDB Distributed, the disk in /var/chroot/var/lib/engine/data of data nodes is monitored, and the disk in /var/chroot/usr/local of other nodes is monitored. For GaussDB Centralized, only data disks of data nodes are monitored. (Unit: %)
   	Log Disk Used Space	Used space of the disk in /var/chroot/var/lib/log of a monitored node. This metric will be updated in real time only for GaussDB Distributed. (Unit: GB)
   	Log Disk Total Space	Total space of the disk in /var/chroot/var/lib/log of a monitored node. This metric will be updated in real time only for GaussDB Distributed. (Unit: GB)
   	Log Disk Usage	Usage of the disk in /var/chroot/var/lib/log of a monitored node. This metric will be updated in real time only for GaussDB Distributed. (Unit: %)
   	ETCD Disk Usage	Usage of disk in /var/chroot/usr/local/etcd on the current node. This metric is available only for GaussDB Centralized.
   	Total swap space, which can be queried via the free -m command	Total swap space, which can be queried via the free -m command
   	Swap usage, which can be queried via the free -m command	Swap usage, which can be queried via the free -m command
   	Inode usage, which can be queried via the df -i command	Inode usage, which can be queried via the df -i command
   I/O	Disk IOPS	Real-time value of data disk reads and writes per second of the monitored node For GaussDB Distributed, the disk in /var/chroot/var/lib/engine/data of data nodes is monitored, and the disk in /var/chroot/usr/local of other nodes is monitored. For GaussDB Centralized, only data disks of data nodes are monitored. (Unit: Count/s)
   	Log Disk IOPS	IOPS of the disk in /var/chroot/var/lib/log of a monitored node. This metric will be updated in real time only for GaussDB Distributed. (Unit: Count/s)
   	Disk Write Throughput	Real-time write throughput per second of the data disk on the monitored node For GaussDB Distributed, the disk in /var/chroot/var/lib/engine/data of data nodes is monitored, and the disk in /var/chroot/usr/local of other nodes is monitored. For GaussDB Centralized, only data disks of data nodes are monitored. (Unit: KB/s)
   	Disk Read Throughput	Real-time read throughput per second of the data disk on the monitored node For GaussDB Distributed, the disk in /var/chroot/var/lib/engine/data of data nodes is monitored, and the disk in /var/chroot/usr/local of other nodes is monitored. For GaussDB Centralized, only data disks of data nodes are monitored. (Unit: KB/s)
   	Log Disk Write Throughput	Write throughput of the disk in /var/chroot/var/lib/log of a monitored node. This metric will be updated in real time only for GaussDB Distributed. (Unit: KB/s)
   	Log Disk Read Throughput	Read throughput of the disk in /var/chroot/var/lib/log of a monitored node. This metric will be updated in real time only for GaussDB Distributed. (Unit: KB/s)
   	Time Required for per Disk Write	Average time required for a data disk write on the monitored node For GaussDB Distributed, the disk in /var/chroot/var/lib/engine/data of data nodes is monitored, and the disk in /var/chroot/usr/local of other nodes is monitored. For GaussDB Centralized, only data disks of data nodes are monitored. (Unit: ms)
   	Time Required for per Disk Read	Average time required for a data disk read on the monitored node For GaussDB Distributed, the disk in /var/chroot/var/lib/engine/data of data nodes is monitored, and the disk in /var/chroot/usr/local of other nodes is monitored. For GaussDB Centralized, only data disks of data nodes are monitored. (Unit: ms)
   	Max. Log Disk Seconds per Write	Seconds per write of the disk in /var/chroot/var/lib/log of a monitored node. This metric will be updated in real time only for GaussDB Distributed. (Unit: ms)
   	Max. Log Disk Seconds per Read	Seconds per read of the disk in /var/chroot/var/lib/log of a monitored node. This metric will be updated in real time only for GaussDB Distributed. (Unit: ms)
   Process Status	om_agent Status	Whether the om_agent process exists on the current node
   	om_monitor Status	Whether the om_monitor process exists on the current node
   	dbmanager Status	Whether the dbmanager process exists on the current node
   	watchdog Status	Whether the watchdog process exists on the current node
   	agentmonitor Status	Whether the agentmonitor process exists on the current node
   Semaphore	Semaphore format. Ipcs -s | wc -1	Semaphore format. Ipcs -s | wc -1
   Password	Password Expiration Time	Password expiration time for accounts Ruby and root.

   You can also perform the following operations:

   • Click Performance History and specify a time range in the upper right corner to view metric details in the last 1 hour, 12 hours, 1 day, 2 days, or 7 days.

     You can also select a metric, click Details in the upper right corner of the graph, and specify a time range in the upper right corner to view metric details in the last 1 hour, 12 hours, 1 day, 2 days, or 7 days.

   • Click the Performance Trends Comparisons tab, select the metrics you want to view, and click OK.

     You can also select the comparison time in the upper right corner of the Performance Trends Comparisons tab page.

   • Enable Interactive Graph to view other metrics.
   • Click Full Screen for a clear view.