We have a CX-240 with about 5 TB of storage. Our OS is aix and we are running a semi-large Oracle database (550G). Our RLP is 400Gb of 5Gb luns spread across the array.

I've got a rolling snapshot setup to take a snap of the Oracle database every 6 hours and I'm retaining 5 copies. For about 8 months now that has been working fine and our RLP has been about 50% used. Over the last 3 or 4 weeks 4 of the source luns has started using up all the RLP in sight. Our RLP is 95% full now. My concern is that the luns are not being recycled as the snapshots are aged out. Not real sure what could be causing this and we're fairly new to this so I'm also not sure if there is some kind of management command we are supposed to be issuing to clean up these luns and make sure they are getting re-used.

Any guidance is appreciated.