How can I stop from using large amounts of disk space?

How can I stop from using large amounts of disk space?

I am running the 11.0.0.1 with a free license.

About 4 months ago I found that the Netflow database was very large.  I reinitialized it and doubled my disk space (to 12 gb) on the server.

Again, the Netflow database is taking up all of my disk space.  I am not sure why it's getting so large.

Currently, the /pgsql/data folder is taking up over 8GB:
/opt/ManageEngine/NetFlow# find . -type d -print0 | xargs -0 du | sort -n | tail -10 | cut -f2 | xargs -I{} du -sh {}
88M     ./jre/lib
89M     ./jre
173M    ./webapps
209M    ./pgsql/data/pg_xlog
225M    ./logs
7.8G    ./pgsql/data/base/16384
7.8G    ./pgsql/data/base
8.0G    ./pgsql/data
8.1G    ./pgsql
8.7G    .

Here are my Storage Settings:
Raw Data : OFF
Retain Aggregate Data : Forever
Retain One Minute Data : 3 Months
Retain NBAR / CBQoS Data : 2 Months

I tried updating my Storage Settings to the following, it had no effect on my disk space.
Raw Data : OFF
Retain Aggregate Data : 1 Month
Retain One Minute Data : 1 Month
Retain NBAR / CBQoS Data : 1 Month

Here's a graphical representation of my disk space, you can see where I reinitialized and added storage space in January.



Thanks!
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