Error : Java heap Space

I have 98 columns/fields and 250,000 rows, every time I run it always error, what i'm doing now is to reduce the :
Max Batch Size (Records) = 10
Max Clob Size (Characters) = 10
Max Blob Size (Bytes) = 10
Fetch Size = 10
because the default is 1000 and an error will occur. How to handle that problem?