Previous chapters have focused on using a single utility to improve your data management. This chapter will be slightly different. Here, we will look at several different tools and techniques for managing sessions in the database.

Users are very important to a DBA in many ways, but first they are the reason why there is need for a DBA. Users (either real or their electronic counterparts) are what keep the database in motion. Managing sessions means the DBA must monitor, tune and troubleshoot the entire outstanding user's activity in the oracle instance. We have different faces of database activity throughout the day, and over weeks, months, and years. It looks like the same data behaving differently throughout a given period, so there will be moments when the database is reported to be slow, there will be times when the database apparently will hang, and there will be other times when the database's performance will look normal from the user's perspective. What...