10. System Performance

A poorly performing system can degrade the performance of all databases and applications deployed on that system. No amount of database, application, or SQL tuning can improve performance when a poorly implemented system is causing performance problems. Applications access databases and both are implemented on an overall system environment, as shown in Figure 10.1. Therefore, a system problem can cause all databases and applications to perform poorly, just as a database problem can cause all applications that access that database to perform poorly.


Figure 10.1. The tuning boxes

A system problem can cause all databases and ...

Get Database Administration: The Complete Guide to DBA Practices and Procedures, Second Edition now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.