niusouti.com

In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments.On further investigation, you find that buffer bu

题目

In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments.On further investigation, you find that buffer busy waits is caused by contention on data blocks.Which option would you consider first to decrease the wait event immediately?（）

A. Decreasing PCTUSED

B. Decreasing PCTFREE

C. Increasing the number of DBWN process

D. Using Automatic Segment Space Management (ASSM)

E. Increasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation

相似考题

1.I'mnotsureaboutthemeaningoftheword.You'dbetterlookitupina____．A．letterB．dictionaryC．postcardD．notice

2.Merry Christmas, George! Here is a card for ________, with ________ best withes.A.you…yourB.you…ourC.us…ourD.us…your

3.Inyourdatabase,theSTATISTICS_LEVELinitializationparameterissettoBASIC.Whatistheimpactofthissetting?()A.Theoptimizerstatisticsarecollectedautomatically.B.Onlythetimedoperatingsystem（OS）statisticsandplanexecutionstatisticsarecollected.C.TheOracleserverdynamicallygeneratesthenecessarystatisticsontablesaspartofqueryoptimization.D.ThesnapshotsfortheAutomaticWorkloadRepository（AWR）arenotgeneratedautomatically.E.SnapshotscannotbecollectedmanuallybyusingDBMS_WORKLOAD_REPOSITORYPACKAGE.

4.What's ( )job? Are ( ) British?A. your, yourB. you, yourC. your, you

更多“In a recent Automatic Workload Repository (AWR) report for your database, you notice a hig ”相关问题

  • 第1题：

    inyourdatabaseinstance,theSTATISTICS_LEVELinitializationparameterissettoBASIC.Whatistheimpactofthissetting()

    A.Optimizerstatisticsarecollectedautomatically.

    B.Onlytimedoperatingsystem（OS）statisticsandplanexecutionstatisticsarecollected.

    C.ThesnapshotsfortheAutomaticWorkloadRepository（AWR）arenotgeneratedautomatically.

    D.SnapshotscannotbecollectedmanuallybyusingtheDBMS_WORKLOAD_REPOSITORYpackage.

    E.TheOracleserverdynamicallygeneratesthenecessarystatisticsontablesaspartofqueryoptimization.


    参考答案：C

  • 第2题：

    Thefollowingcommandisexecutedtocreatethebaselinetemplate：SQL>EXECUTEDBMS_WORKLOAD_REPOSITORY.CREATE_BASELINE_TEMPLATE（START_TIME=>TO_TIESTAMP（SYSDATE+2），END_TIME=>TO_TIMESTAMP（SYSDATE+10），BASELINE_NAME=>’Mybase4’，TEMPLATE_NAME=>’Mytemp4’，EXPIRATION=>NULL）；Whichstatementistrueabouttheeffectoftheabovecommand？（）

    A.Itcreatesabaselinetemplatethatneverexpires.

    B.Itproducesanerrorbecausenosnapshotinformationisprovidedtocreatethebaseline.

    C.ItcreatesabaselinetemplatethatexpiresaftertheAutomaticWorkloadRepository（AWR）retentionperiod.

    D.ItcreatesarepeatingbaselinetemplatethatrepeatsaftertheAutomaticWorkloadRepository （AWR）retentionperiod.


    参考答案：A

  • 第3题：

    YouworkasadatabaseadministratorforCertkiller.com.YouhavesettheretentionperiodforAutomaticRepository（AWR）statisticstofourdaysandcollectionintervalto15minutes.YouwanttoviewthestatisticscollectedandstoredinAWRsnapshot.WhichtwomethodswouldyouusetoviewtheAWRstatistics？（）

    A.useenterprisemanager

    B.useDBMS_SQLpackage

    C.useDBMS_AWRpackage

    D.usePRVT_WORKLOADpackage

    E.querytheAWRsnapshotrepositoryobjects

    F.useDBMS_WORKLOAD_REPOSITORYpackage


    参考答案：A, F

  • 第4题：

    YouworkasadatabaseadministratorforSupportcenter.cn.YouhavesettheretentionperiodforAutomaticRepository（AWR）statisticstofourdaysandcollectionintervalto15minutes.YouwanttoviewthestatisticscollectedandstoredinAWRsnapshot.WhichtwomethodswouldyouusetoviewtheAWRstatistics？（）

    A.useenterprisemanager

    B.useDBMS_SQLpackage

    C.useDBMS_AWRpackage

    D.usePRVT_WORKLOADpackage

    E.querytheAWRsnapshotrepositoryobjects

    F.useDBMS_WORKLOAD_REPOSITORYpackage


    参考答案：A, F

  • 第5题：

    Youhavecreatedabaselinemetric，DISK_IO_BL，forthediskI/OmetricsinyourPRODdatabaseandyouhavebeengettingnotificationswheneverthedatabaseperformancedegrades.YouoptimizethedatabaseI/Otogaintheperformanceandyoudecidetoremovethebaselinemetrics.WhichmethodwouldyouusetoremovetheDISK_IO_BLbaselinemetrics？（）

    A.Thebaseline，oncecreated，cannotberemoved.

    B.DisablethebaselinemetricsintheDatabaseControlManageMetricspage.

    C.Thebaselinewillbeautomaticallyremovedoncethedatabaseperformancehasbeenoptimized.

    D.DropthebaselinemetricsbyusingDBMS_WORKLOAD_REPOSITORY.DROP_BASELINEprocedure.


    参考答案：D

  • 第6题：

    （ ） – Is Miss White __________ English teacher, Maria?

    – No, she teaches __________ geography.

    A．your；my

    B．you；mine

    C．you；us

    D．your；us


    正确答案：D

相关内容