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

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.