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4 A, B, and C These conditions could all cause problems when using the directory, but not when creating it D, E, and F D is wrong because the existence of the directory is not checked at creation time E is wrong because while network mode does not need a directory for the dump file(s) it will need a directory for the log file(s) F is wrong because it confuses the issue of Oracle permissions on directories with operating system permissions on physical paths 5 A SQL*Loader is a client-server process: the input files must be local to the user process B, C, and D B is wrong because the input files must be on the PC, accessible to the client-side process C and D are wrong because direct load is not relevant to the location of the files 6 A and D These are the only two methods to enable resumable space allocation B, C, and E B and C are wrong because resumable space allocation is enabled at the system level with the instance parameter RESUMABLE_TIMEOUT E is wrong because while there is a package DBMS_RESUMABLE, it does not (rather annoyingly) include a procedure to enable resumable space allocation 7 D As suspended implies, the statement will continue from the point at which it stopped A, B, and C The timeout controls how long the suspension can last before returning an error: it is the period during which the problem can be fixed 8 A and B Both purging dropped objects and shrinking tables will release space immediately, with no downtime C, D, and E An index can be shrunk, but this will release space within the index, not return it to the tablespace Relocating either indexes or tables has implications for availability of the data 9 C The MMON background process raises alerts A, B, D, and E A is wrong because while Database Control reports alerts, it does not raise them B is wrong because the DBMS_SERVER_ALERT API is used to configure the alert system; it does not implement it D and E are wrong because foreground and background processes will encounter problems, not warn of their imminence 10 D Row movement is a prerequisite for a table shrink operation A, B, and C A is wrong because compaction is part of the shrink, not a prerequisite B is wrong because there is no need to disable triggers they will be disabled automatically C is wrong because row movement must be enabled, not disabled.

In this chapter you will learn to 052122 Use and Manage Automatic Workload Repository (AWR) 052123 Use Advisory Framework 052124 Manage Alerts and Thresholds

To add a second light source, click the small light bulb icon below the preview in the Lighting Effects window, and drag it into your image in the location where you want the light to sit To remove a light source, drag it to the trash can icon in the preview window

The manageability infrastructure provided with Oracle Database 11g can be used to automate a significant amount of the database administrator s day-to-day work With earlier releases, monitoring the database in order to pick up developing problems before they became critical took too much time Identifying and diagnosing performance issues was not only time-consuming but also required much skill Use of the Alert system and the diagnostic advisors, installed as standard in every 11g database, frees the DBA from the necessity of devoting a large amount of effort to this work

Oracle collects a vast amount of statistical information regarding performance and activity This information is accumulated in memory and periodically written to the database: to the tables that make up the Automatic Workload Repository, the AWR The AWR exists as a set of tables and other objects in the SYSAUX tablespace The AWR is related to the data dictionary, but unlike the data dictionary, the AWR is not essential for the database to function (though it may be necessary for it to function well) Data is written to the AWR, stored for a while, and eventually overwritten with more recent information

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With the recent resurgence into researching one s family history, people often ask me how to clean up old photographs While the actual techniques used to retouch old photographs vary greatly according to the particular problems encountered, there are a few tried and true tips I can offer that seem to be useful in the majority of cases Compare the photos in Figure 9-12 to see how I used these techniques to fix this photo of my husband s aunt To retouch one of your old photographs, you need to first inspect it to determine the problem areas, which are listed next Then, proceed with the appropriate steps, according to the problems you find If one technique doesn t work for your particular problem, try another until you find something that does work