Meaning of WHOLE in English
BAD : As a whole, I am very happy here.
GOOD : On the whole, I am very happy here.
as a whole = considered as a single body or unit: 'The country as a whole is not ready for another election.'
on the whole = generally speaking: 'On the whole, I can see no reason why you shouldn't apply.'
Longman Common Errors English vocabulary. Английский словарь распространенных ошибок Longman. 2012