Viewing Performance Metrics of a DB Instance

DBA Assistant allows you to view the performance metrics of your DB instance. Historical trends of performance metrics within a specified time period help you learn about the status and resource usage of your DB instance. If any alarm is reported, you can take actions timely. For details, see Viewing Real-Time Metrics.

RDS supports monitoring by seconds. You can set the monitoring interval to 1s or 5s for higher precision. For details, see Configuring Monitoring by Seconds.

Billing

The following table lists the price of monitoring by seconds.

**Table 1** Pay-per-use price
Specification Code	Price (USD/Hour)
rds.mysql.second.monitor	0.012

Procedure

Click in the upper left corner and select a region.
Click in the upper left corner of the page and choose Databases > Relational Database Service.
On the Instances page, click the DB instance name.
In the navigation pane, choose DBA Assistant > Real-Time Diagnosis.
Click the Performance tab to view historical performance for each metric of your instance within the same time range on different days.

Figure 1 Viewing real-time performance

Click in the upper left corner and select a region.
Click in the upper left corner of the page and choose Databases > Relational Database Service.
On the Instances page, click the DB instance name.
In the navigation pane, choose DBA Assistant > Real-Time Diagnosis.
On the Performance tab page, click Enable Monitoring by Seconds.
In the displayed dialog box, enable Monitoring by Seconds and click OK.
- This function is unavailable for any DB instances with fewer than four vCPUs.
- Once you turn on this function, the system will report monitoring data again and show it in about 5 minutes.
- You can turn off this function if needed. Once it is turned off, the system will report monitoring data again and show it in about 5 minutes.
Figure 2 Enabling Monitoring by Seconds