Oracle Database 11 g - Online Public Access Catalog

CHAPTER 4 ■ PERFORMANCE MANAGEMENT 215Specifying the Type of ADDM TaskYou can use the DBMS_ADVISOR package’s set_default_task_parameter procedure to specify thetype of ADDM analysis you want to run. You set the values for the instance and the instance’sparameters to select among a database ADDM, instance ADDM, or partial analysis ADDM.Advisor FindingsThe various advisors that are part of the management advisory framework issue findings.Oracle Database 11g names and classifies the advisor findings, making it easier for you tokeep track of the frequency with which various findings occur. There is a new view namedDBA_ADVISOR_FINDINGS that lets you look up all finding names. Here’s a query that letsyou view all findings in the database:SQL> select finding_name from dba_advisor_finding_names;FINDING_NAME-----------------------------------normal, successful completion"Administrative" Wait Class...Buffer Busy...Undersized instance memory80 rows selected.SQL>There is also a new FINDING_NAME column added to the DBA_ADVISOR_FINDINGS view,which lets you make queries such as the following:SQL> select finding_name,impact from dba_advisor_findings;FINDING_NAMEIMPACT----------------------------------- -------------normal, successful completion 0normal, successful 0I/O Throughput 34077700Undersized instance memory 140000000Hard Parse 256895416...78 rows selected.SQL>Classification of findings applies to all types of advisors, not just the ADDM, and helps youfind the frequency with which different findings are issued.