Procurve 2824 Slow Dropped Samples

[beovax]

I have configured a port to monitor sflow with a sampling rate of 50. I am seeing a lot of dropped samples (currently 3271685 over the last week) I have increased the sampling rate to 100 but I am still seeing a lot of dropped samples.

What does this mean, is it a problem with the switch being unable to process them, or unable to pass them to my sflow collector?

Is there anything I can do to fix this, I am not seeing relaible bandwidth usage on the collector :(