Figure 3-4 shows the processing when failover occurs on a monitoring Oracle host.
Figure 3-4 Processing when a monitoring Oracle host performs failover
![[Figure]](figure/zuo04003.gif)
- Note:
- A failover on the monitoring Oracle host may cause temporary errors in the historical collection of the performance data.
- Moreover, before and after the failover, the value of collected data may be negative. Note that for data after the failover is completed, positive values are used as the data differentials.