ssis help

Hi I have one doubt in ssis
how to give performance while loading data from sql serve to postgres

sql server table : emp have 20 lakhs records with 20 fields

postgres server : emp  

I want load data from sql serve to postgres using ssis 
here no business logics  and no data conversion.its 
tasking more than  20 hours 

system ram is : 8 gb
odbc batch size : 1000


could you please tell me how to improve performance while loading data from sql serve to postgres using ssis package