Storage Cell Monitoring
By now, we’ve covered Exadata architecture enough for you to know that the storage cells are independent of the database servers and provide their own metrics and counters. Since the database servers don’t directly communicate with the storage, it’s up to the storage cells to provide the database servers with the requested data. To help with that task, the storage cells have their own CPUs and memory, which provide additional resources to assist in the processing of data. They also have their own O/S-level user accounts, two of which we will concern ourselves with in this chapter.
The accounts of interest are ...