Redshift RI's breaking ec2_instance costs

[fitchtravis]

Hi,

After purchasing some RedShift RI's (9 x dc2.large), our Redshift costs has increased dramatically whislt ec2_instance has dropped dramatically. Any thoughts on the issue?

Product	July		June		May		April		March		February
	total	hourly	total	hourly	total	hourly	total	hourly	total	hourly	total	hourly
redshift	$193,105	$260	$2,134	$3	$2,206	$3	$2,129	$3	$2,202	$3	$2,390	$4
ec2_instance	$14,967	$20	$78,298	$109	$106,842	$144	$89,022	$124	$88,273	$119	$76,191	$113