Oracle 9i. Database Performance Methods by Cyran M.

By Cyran M.

This booklet describes how one can increase Oracle functionality through beginning with strong program layout and utilizing data to watch program functionality. It explains the Oracle functionality development procedure and the Emergency functionality procedure, and it presents innovations for facing functionality difficulties.

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By Cyran M.

This booklet describes how one can increase Oracle functionality through beginning with strong program layout and utilizing data to watch program functionality. It explains the Oracle functionality development procedure and the Emergency functionality procedure, and it presents innovations for facing functionality difficulties.

Show description

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3. Oracle Enterprise Manager (EM) Oracle Enterprise Manager provides a graphical user interface for collecting, storing, and reporting performance data. The EM Intelligent Agent data gathering service can collect this performance data on a scheduled basis. A 2-6 Oracle9i Database Performance Methods Importance of Statistics single agent can manage the data collections for all Oracle databases and the operating system of the target node. The data is automatically stored in an historical data repository for performance reporting.

Tables grow over time, and indexes are subject to the individual behavior of the application in terms of key generation, insertion pattern, and deletion of rows. The worst case is where you insert using an ascending key and then delete most rows from the left-hand side but not all the rows. This leaves gaps and wasted space. If you have index use like this make sure that you know how to use the online index rebuild facility. Most good DBAs monitor space allocation on a per object basis and look for objects that could grow out of control.

Tables grow over time, and indexes are subject to the individual behavior of the application in terms of key generation, insertion pattern, and deletion of rows. The worst case is where you insert using an ascending key and then delete most rows from the left-hand side but not all the rows. This leaves gaps and wasted space. If you have index use like this make sure that you know how to use the online index rebuild facility. Most good DBAs monitor space allocation on a per object basis and look for objects that could grow out of control.

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