Database Reference
In-Depth Information
By default, the standby was created by using Maximum Performance protection mode.
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This mode ensures
that if a network connectivity problem exists between the primary and the standby databases, it will not impact the
primary database's performance. However, this has the potential for data loss. Because we are using a local Data
Guard, it may be feasible to enable Maximum Availability protection mode. This will also not impact the availability
and performance of the primary database if a network connectivity issue arises, but provides a higher level of data
protection. Change the protection mode to Maximum (see Figure
13-14
).
Figure 13-14.
Changing the Data Guard protection mode
The protection mode changes will be reflected in the console, as seen in Figure
13-15
. Changing from Maximum
Performance to Maximum Availability will also change the redo transport mode from Asynchronous (ASYNC) to
Synchronous (SYNC).
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Protection mode
refers to the accepted potential data loss in event of primary database failure. The three available modes are
Maximum Performance, Maximum Availability, and Maximum Protection.
