Hello, everyone.
I've got a setup where a single hub has almost 80 tunnels established to my firewalled remote locations. Remote machines mostly report the standard metrics - cdm, interface_traffic and storage qoses, so the qos flow isn't that huge. Once the tunneling is enabled on the hub, responsiveness of the hub dramatically deteriorates. I'm receiving frequent communication errors when opening probe's configurations and the distribution tool is absolutely unusable as it complains that there is "no contact with distribution server". Infrastructure Manager is sluggish and unviable as well. In the beginning I though there might be some excessive DB load and increased hub_bulk_size to 2000, but to no avail. The disk IO for the SQL server varies from 1 to 30 mb\s per second, which is acceptable and shouldn't be a bottleneck. Average CPU load on the server is as low as 5%. Therefore, it's neither the DB fault, nor the lack of resources. At least this is how it looks. Once the tunneling is disabled, the GUI becomes lightning fast.
How do I find the real bottleneck that makes the hub that slow?
UIM 8.31
Win8kR2
32 GB RAM
24 cores CPU