Poisson distribution - goodness of fit

#1
I want to test goodness of fit for poisson distribution for a very large data set (~millions of records).
Can anybody suggest a method? All the methods that are available are for small data sets.
 

BGM

TS Contributor
#2
I am not quite understand your difficulty. Do you mean the ordinary Chi-square test is
computationally infeasible with your data set?