Instance Performance

The Instance Performance page displays key metrics of your instance and provides metric comparison between different days. You can keep track of metric changes and detect exceptions in a timely manner.

DAS Intelligent O&M displays metrics of an instance, such as disk usage, load, and kernel resource.

Procedure

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

Alternatively, on the Overview page, click Go to Intelligent O&M.
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
Select the target instance and click Details.
Choose Performance > Instance Performance > Performance History.

Click Select Metric, select the instance metrics to display, and click OK.

**Table 1** Instance metrics
Category	Metric	Description
Disk Usage	Instance Disk Used Space	Real-time used space of data disks on the monitored instance (Unit: GB)
	Instance Disk Total Space	Real-time total space of data disks on the monitored instance (Unit: GB)
	Instance Disk Usage	Real-time data disk usage on the monitored instance (Unit: %)
Load	Deadlocks	Incremental number of database transaction deadlocks (Unit: count)
	Response Time of 80% SQL Statements	Real-time response time of 80% of database SQL statements (Unit: μs)
	Response Time of 95% SQL Statements	Real-time response time of 95% of database SQL statements (Unit: μs)
Kernel Resource	Buffer Hit Rate	Buffer hit rate of the database (Unit: %)

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.
Figure 2 Querying metric details
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.
Figure 3 Viewing performance trends comparisons
Enable Interactive Graph to view other metrics.
Click Full Screen for a clear view.