BW 7.3 Data load taking long time

Hi Experts,

I am loading data from standard DSO to Cube the load is taking long time there is no start or end routine. In the DTP monitor I see Its taking more time in the step extracting data from dso to cube.

In SM50 I see this statement CL_SQL_STATEMENT==============CP is running for more than one hour, this is happening all of sudden. Last month I loaded the same cube it took regular time for loading 1 million record now its taking more time and its hanging on extraction step.

What could be the issue? How to solve this? Looks like issue with database.

Thanks,

Anand.