Amazon Redshift VACUUM error

Question

I'm trying to run vacuum delete only on a table with big amount of columns (800+) and 4 million rows.

I know it's recommended to use deep copy instead, but still am wondering if running vacuum is still possible on such big table. This is my error:

vacuum_max_buffer is too small to vacuum table <table> - need at least: 3388MB

is it possible to change the value of vacuum_max_buffer (set vacuum_max_buffer=xxxxx), or is it best not to change this and go on with the deep copy?

Thanks, Meny