TAILIEUCHUNG - Oracle Database 2 Day DBA 11g Release- P5

Oracle Database 2 Day DBA 11g Release- P5:Oracle Database 2 Day DBA is a database administration quick start guide that teaches you how to perform day-to-day database administrative tasks. The goal of this guide is to help you understand the concepts behind Oracle Database. It teaches you how to perform all common administrative tasks needed to keep the database operational, including how to perform basic troubleshooting and performance monitoring activities. | Instances Oracle By Example Series See Also Oracle Database Performance Tuning Guide for more information about memory parameters and their tuning About Memory Management on page 5-13 Instances Oracle By Example Series Oracle By Example OBE has a series on the Oracle Database 2 Day DBA guide. This OBE steps you through the tasks in this chapter and includes annotated screenshots. To view the Instances OBE in your browser enter the following URL http technology obe 11gr1_2day_dba instance Managing the Oracle Instance 5-21 Instances Oracle By Example Series 5-22 Oracle Database 2 Day DBA 6 Managing Database Storage Structures This chapter discusses using Oracle Enterprise Manager Database Control Database Control to view and manage the storage structures of your database. This chapter contains the following sections About Database Storage Structures Viewing Database Storage Structure Information Performing Common Database Storage Tasks Managing the Redo Log Managing Undo Data Storage Oracle By Example Series About Database Storage Structures An Oracle database is made up of physical and logical structures. Physical structures are those that can be seen and operated on from the operating system such as the physical files that store data on a disk. Logical structures are created and recognized by Oracle Database and are not known to the operating system. The primary logical structure in a database a tablespace contains physical files. The applications developer or user may be aware of the logical structure but is not usually aware of this physical structure. The DBA must understand the relationship between the physical and logical structures of a database. Figure 6-1 on page 6-2 shows the relationships between logical and physical structures. This figure also shows recovery-related structures that are optionally kept in the flash recovery area. See Flash Recovery Area on page 9-3 for more information. Managing Database Storage Structures .

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