Currently the sampling interval in ngrinder is 1000 ms.However sampling evey seconds can cause a lot of timing issue. Each agent send the its test result every 500 sec and it does not reflect to the total statistics if sampling is fired while the data is accumulated. it causes inconsistency b/w total statistics and individual statistics views in chart by ngrinder.
Actually the final result is always correct, but user might raise issue on this problem. So It's better to provide the description of this problem on the page, and provide the way to increase the sampling interval by the user.