Start the meteor project, the background data access traffic is too large

Since this is a test server, and database to do authentication processing. Database binding on the local network adapter (127.0.0.1), size of about 600 M. The project starts, in the absence of people visit, I monitor the traffic on the network CARDS, found that the average flow rate at 5 m/S, is this normal? If not, how do you solve this problem? I tried to reduce the size of the database and found that it did not reduce the traffic.

A screenshot is attached below.
2018-03-12_084301