This message means that automatically detected boundary points got clamped after report more than 60 metrics in a period as set under IntroscopeAgent.Profile, you can adjust the setting as below:
# Maximum number of traced entry points and automatic backends that can be persisted in the AutoPersist pbd.
# Change to this property takes effect immediately and does not require the
# managed application to be restarted.
You can raise the value from 60 to 150 and see the results.
Change to this property takes effect immediately.