What Is The Difference Between Latches And Enqueues?

1.	What Is The Difference Between Latches And Enqueues?
Answer» Enqueue is used to queue request for lock on any DB object that can't be served immediately and session is ready to wait. Latches are internal locking mechanism of Oracle to provide short term exclusive access to Oracle's internal objects LIKE LIBRARY cache etc. Another DIFFERENCE is that ENQUEUES follow first in first out (FIFO) algorithm while latches do not follow any such algorithm.

Answer»

Enqueue is used to queue request for lock on any DB object that can't be served immediately and session is ready to wait.
Latches are internal locking mechanism of Oracle to provide short term exclusive access to Oracle's internal objects LIKE LIBRARY cache etc.
Another DIFFERENCE is that ENQUEUES follow first in first out (FIFO) algorithm while latches do not follow any such algorithm.

Discussion