If TCP children are busy,Please correct me if I am wrong if the remote IP is not responding via TCP protocol, this leads to a timeout and this child is busy.
If many remote endpoints are not reachable via TCP this can lead to the case when half or more children are by timeout operations.
I think required to monitor how many children are busy.
Is it possible to get such info using kamcmd utility, statistics module, or xprom module.
Sergey