Things change over time. When I joined Oracle in August 1993, version 6 of Oracle Database was still a production release, and version 7.0 was the new Database version just being adopted. Back then, a DBA had at most a handful of databases to manage. The size of those databases was trivial compared to the size of databases today. The number of end users for each database was typically very small—remember, those were client-server days, before Internet deployments were possible. Also, a database application most times had its own resources—machine resources, such as its own computer, disk drives, memory, and so on. The need to be available 24×7 ...
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