When set to 5 seconds (the default), the number of connections opened to the HANA DB is one every 5 seconds:
If you check the number of connections with a tool such as TCPView or Process Monitor, you will see a very high number of ESTABLISHED connections over time:
Note that the HANA DB SQL port is 3<xx>15.
Under certain heavy network load, you could be causing more strain on your PC, the network and the HANA server.
Simply decrease the refresh time and this will allow your PC to close off the un-wanted connections in time to create the new ones, reducing your CPU consumption.