Is there a possibility that the dgraph will automatically sleep and need ratel to wake up?

Sometimes after i didn’t query for a while, the result for some dgraph query takes a lot time and the chrome shows pending. If i ask another simple query in ratel at the same time, the result can be obtained very quickly, and the above request can also get results quickly. Is there a possibility that the dgraph will automatically sleep and need ratel to wake up?

I don’t think so. Maybe the connection was closed due time.