Please report the exceptions to
support@yourkit.com It's better to report problems to product developers than disscuss them here.
Regarding retained size calculation: please read "Shallow and retained sizes" section of bundled help. It describes in details the concepts. It's absolute not true that objects of the same type have the same retained size.
Best regards,
Vladimir Kondratyev
YourKit, LLC
http://www.yourkit.com "Don't get lost in data, get information!"