Hi,
There are two modes, push mode & pull mode.
Pull mode
In pull mode, the client connects to the manager according to the heartbeat frequency. This procedure repeats indefinitely. The number of clients that can be supported in pull mode depend on the following conditions:
Push mode
In push mode, the client establishes a persistent TCP connection to the server. If a client cannot connect to the management server, it retries periodically, depending on the heartbeat frequency. The following conditions apply to push-mode communication:
Client will connect to SEPM according to heartbeat and take the definitions.
I think setting you have configured are applicable for SEPM liveupdate not for client liveupdate.
You can take the help of other tools to find out which process is actually slowing down the system.