怎么查看自己的mongodb的锁粒度呢？ mongodb有多种级别的锁粒度，是需要自己设置吗？
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No need, the system automatically controls the use of the most efficient and reasonable lock. However, the MMAPv1 engine only supports collection-level locks, and WT supports document-level locks.
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No need, the system automatically controls the use of the most efficient and reasonable lock.
However, the MMAPv1 engine only supports collection-level locks, and WT supports document-level locks.