(The Oracle diagnostic package is part of the Oracle Database 11g product set. It combines a series of automated performance diagnosis and monitoring functions built into the core database engine and Oracle Enterprise Manager. Whether you are managing a database or multiple databases, Oracle diagnostic kits provide a complete, cost-effective and easy-to-use solution for your Oracle database performance management. When used as part of the enterprise manager grid control, the diagnostics pack also provides enterprise wide performance and availability reports, a centralized repository of performance information, and useful cross system performance collection, significantly simplifying the task of managing a large number of databases.)
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