Hi Kristian,
You may look at tuning this parameter values to achieve desired results.
rslg/max_diskspace/local
rslg/central/file
rslg/central/old_file
To store 9 months of data you may need enough disk space and adjust the value of parameter rslg/max_diskspace/local to appropriate value.
Hope this helps.
Regards,
Deepak Kori