What does it mean when the Logical Session Cache in MongoDB is being filled up while fewer sessions are being cleaned up?

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When the Logical Session Cache in MongoDB is being filled up while fewer sessions are being cleaned up, it means that there are more active sessions than expected and that the cleanup process is not performing as expected. This can lead to a situation where the cache becomes full, and new sessions cannot be created, or performance may decrease due to the large number of active sessions. It is essential to identify the cause of the increase in active sessions and address the cleanup process to ensure that the cache does not become full. It may also be necessary to increase the size of the cache to accommodate the increase in active sessions.