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Oracle Database 11g Performance Tuning Recipes: A Problem-Solution Approach
book

Oracle Database 11g Performance Tuning Recipes: A Problem-Solution Approach

by Sam R. Alapati, Darl Kuhn, Bill Padfield
August 2011
Intermediate to advanced content levelIntermediate to advanced
594 pages
15h 54m
English
Apress
Content preview from Oracle Database 11g Performance Tuning Recipes: A Problem-Solution Approach

C H A P T E R  5

Minimizing System Contention

It's not uncommon for Oracle DBAs to field calls about a user being locked or “blocked” in the database. Oracle's locking behavior is extremely sophisticated and supports simultaneous use of the database by multiple users. However, on occasion, it's possible for a user to block another user's work, mostly due to flaws in application design. This chapter explains how Oracle handles locks and how to identify a session that's blocking others.

Oracle database can experience two main types of contention for resources. The first is contention for transaction locks on a table's rows. The second type of contention is that caused by simultaneous requests for areas of the shared memory (SGA), resulting in ...

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Publisher Resources

ISBN: 9781430236627Purchase book