問題文
An instance sometimes runs out of room in one memory pool while another pool is only half used. Which statement describes what happens when the DBA sets a single target for the shared memory instead of sizing each pool?
選択肢
- The instance moves memory between the pools as the workload changes, so a pool that runs short can grow while a pool that is not being used gives room back to the other pools of the instance.
- The instance divides the target equally between the pools at startup, so a pool that runs short has to wait until the next restart before it receives more room from the others.
- The instance writes the contents of the pool that runs short to disk, and the room is freed for the other pools and the contents are read back when they are needed again.
- The instance uses the target as an upper limit for each pool separately, so a pool that runs short can grow until it reaches the target on its own.