Content store size is increasing day by day as it is storing the report output

[bensah]

Content store is increasing day by day as it is storing the report output.
Any option to delete the report output.I am using cognos 10.1.0. I have tried the below options but it seems it is not working.
I have created one content removal job under Administration->content administration and select the public folder. select to keep the output history for 2 months and will delete for all.
The job is showing successful but it seems it is not deleting the report output from the cognos portal.
Any clue ?