Which three resources are managed using global concurrency control in an Oracle 12c RAC multiinstance database? (Choose three.)
A.
latches
B.
enqueues
C.
database block buffers
D.
mutexes
E.
cursors
F.
redo log buffers
Which three resources are managed using global concurre…
Which three resources are managed using global concurrency control in an Oracle 12c RAC multiinstance database? (Choose three.)
I think Correct: A, B, D
Latches and mutexes may only protect access to memory structures if they are accessed by
processes in the same instance.
In RAC, latches and mutexes are still used, but for global concurrency control, some
additional global enqueues are used to provide protection across instances.
RAC, therefore, requires additional global concurrency
controls to mediate access across instances.
– Global locks control library and row cache access.
– Global enqueues control resource access.
– Cache fusion controls buffer cache access.
Agree, Correct: A,B,D
Also the other options are not possible, they are not part of concurrency control