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The SQL Access Advisor provides advice on materialized views, indexes, and materialized view logs, in order to design the most appropriate access structures to optimize SQL queries. 5 shows you how to use the SQL Access Advisor.

If the user account is incorrectly configured with a null password, the script creates a message explaining this state of affairs and appends it to the warning-output file. The contents of this file will be added to the final report at a later stage.

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Often, table segments become fragmented over time. The Segment Advisor checks database object space usage and helps you regain excess space in segments by performing segment-shrinking operations. The advisor also helps in predicting the size of new tables and indexes and analyzing database-object growth trends. 17 shows you how to use the Segment Advisor.

The Undo Advisor can recommend the correct size for your undo tablespaces and undo retention parameter, both of which are based on transaction volume and length. The advisor also can take into account undo requirements for supporting flashback features for a given length of time. 6 shows you how to use the Undo Advisor to get recommendations about the undo tablespace and the undo retention period.

The SGA Memory Advisor recommends the ideal SGA size. The PGA Memory Advisor provides recommendations for the PGA parameter, based on the workload characteristics of the instance. 17 provides examples of the use of the SGA and PGA Memory Advisors.

You ve seen a bewildering number of tools and components of management infrastructure for monitoring and managing your Oracle databases. Traditionally, DBAs used a variety of methods to manage and monitor their databases, and complaints about frequent midnight pages and weekend work were common. You can avoid all that by taking a proactive approach and by automating management as much as you can and with Oracle Database 10g, you can automate quite a bit!

My advice is not to reinvent the wheel by using outmoded monitoring scripts and management techniques. Here s a suggested way to use Oracle s variety of tools to maximum benefit: Make the OEM Database Control or Grid Control your main DBA tool. You can access all the monitoring and performance tools through the OEM. Configure the OEM to send you eventbased pages or e-mails. Use RMAN and Oracle Backup as your main database backup solutions. Configure the flash recovery area so you can automate backup and recovery. Use the Scheduler to automate your job system. Use locally managed tablespaces (automatic segment space management is the default, starting with Oracle Database 10g Release 2). Change your export and import scripts to the new Data Pump technology, both to save time and to take advantage of the new features. Wherever possible, use the Database Configuration Assistant (DBCA) to create new databases and the Database Upgrade Assistant (DBUA) to upgrade to Oracle Database 10g from earlier versions. Let Oracle automatically collect statistics don t bother using the DBMS_STATS tool to manually collect optimizer statistics. Make sure you collect system statistics in addition to the automatic optimizer statistics collected by Oracle. Let Oracle manage the SGA and the PGA automatically. Automate both the undo management as well as checkpointing. Use Oracle s alert system to prevent space-related problems. Make use of the SQL Access Advisor to recommend new indexes and materialized views. Let the Segment Advisor, which runs automatically in Oracle Database 10g Release 2, recommend objects to shrink. Shrinking objects will reclaim unused and fragmented space, as well as decrease query response time. Use the SQL Tuning Advisor to tune problem SQL code. Each of these topics is explained in detail in the rest of this book.

if [ "$pass_word" = "" ] then echo "$user $padding WARN: $user has null password set, \ set password or lock account" >> $WARNOUT fi

// As I will discuss later, #pargma managed is not recommended; it is only // used to show exceptions thrown across managed / unmanaged boundaries // without using two source files #pragma managed (push, off) int main() { __try { f(); } // (' COM') evaluates to 0xE0434F4D __except(GetExceptionCode() == (' COM') EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH ) { cout << "Managed Exception caught in native code" << endl; } return 0; } #pragma managed (pop)