Oracle Utilities MDM is well suited for users that have plenty of money to invest in technical hardware resources to support the requirements of this application. With the electric utility industry becoming more and more precise data-wise, the requirements for data storage and processing are only going to increase. For example, electrical usage measurement used to be a once-a-month practice; in the 1990s, hourly reading was introduced; recently, 15-minute interval readings have been introduced and will become the new norm. Going from one reading a month, to 720, to now 2,880 requires expensive hardware. MDM is able to handle this load, in our experience, only if you purchase Oracle's Exadata hardware, which is priced at a premium. Beyond data storage itself, we have also found that MDM real-time usage for users is also, unfortunately, best with Exadata. Likely because Oracle developed this hardware, and because it has built-in compression, portioning, and tuning features, performance is better.
One note is that Oracle does provide a purge-and-archive strategy in the more recent versions of MDM (i.e. ILM). However, implementation of this is a small project in itself, although worthwhile in the long run.