By default, the APN shaper samples traffic every second. In some cases, you may want to sample traffic more often. You can do this by enabling sub-second sampling in a GTP profile and setting the sub second sampling interval.
The following command enables sub-second sampling for a GTP profile and sets the sub-second sampling interface to 0.1 seconds:
config firewall gtp
set sub-second-sampling enable
set sub-second-interval 0.1
sub-second-interval can be 0.5, 0.25, or 0.1 seconds.