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You are using the Performance Schema to investigate replication on a slave which has a...

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You are using the Performance Schema to investigate replication on a slave which has a single master. The option slave-parallel-type is set to DATABASE.

Assume that all instruments and consumers are enabled and all threads are instrumented.

Which two facts can be concluded from the given output? (Choose two.)

A.

The slave has two intermediate relay slaves connected to it.

B.

The slave is configured with slave_parallel_workers = 4

C.

At most, two schemas are being updates concurrently.

D.

THREAD_ID 21 has stopped running.

E.

The slave cannot process the relay log fast enough to use all threads.

F.

The server needs more cores to use all slave threads.

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