You can observe the functioning of Replication AI Streaming in the Replication Monitor. Start the monitor on your target machine, and select Replication Agent Status.

Observe the status of Replication AI streaming, and the cache, with the following lines of the output:


    AI Streaming enabled:                       1
    Replication streaming block cache:
        Cache size:                             5000
        Free cache entries:                     999
        Used cache entries:                     1
        Cache high water mark:                  175
        Number of times cache filled:           0

Observe the status of any latency between the target and the source, with the following lines of the output:


    AI Block Information:
        Source RDBMS Block (Seq / Block):       4 / 6905
        Last Received Block (Seq / Block):      4 / 6884
        Last Processed Block (Seq / Block):     4 / 6884
    Latency Information:
        Repl Server behind Source DB by:        0     second(s)
        Current Source Database Transaction:    2303
        Last Transaction Applied to Target:     2303
        Target Current as of (Target, Source):  Tue May 15 18:15:58 2018, Tue May 15 18:15:58 2018 with delta of 000:00:00
        Number of blocks to send on Source:     0 as of Tue May 15 18:16:40 2018
        Number of blocks to process on Target:  0 as of Tue May 15 18:16:40 2018
        Time delay to process the last block:   0 second(s)

For descriptions of each line of the Replication Agent Status output, see Replication agent status.