This Counter32 increments each time an acknowledgment arrives while the hold queue is empty and there is no outstanding unacknowledged data, meaning the transport was fully idle waiting for the user application to hand it more data. A high increment rate here tells an admin the bottleneck is upstream of the transport (the application isn't producing data fast enough) rather than the network itself. For example, a monitoring tool logging frequent HoldCountRatio1 increments during a slow upload would point the admin at the source application, not the link.