实用的检查程序(3)

prompt

prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++

prompt+7.0SortAreaSize +

prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++

prompt

ttitleleft"***SortArea***"Skip1

Selectsubstr(name,1,25) "SortAreaName",

substr(value,1,15)"Value"

fromv$sysstat

wherenamelike'sort%'

/

prompt

prompt<<<<<<<<<<<<<<<<<<<NOTE:>>>>>>>>>>>>>>>>>>>>>>

prompt7.0Invesigation

promptThelowerthevalueofthesortstodisk,

promptthebetterthesortisperforming.

promptSORT_AREA_SIZEcan'tbeincreaselargeenoughtoelimatesortstodisk

promptTheSortsonadatabasearelow-maintenanceitems

promptUsually,SORT_AREA_SIZEandSORT_AREA_RETAINED_SIZEshouldbesettothesamevalue

promptTheOptimalValueofSORT_AREA_SIZEandSORT_AREA_RETAINED_SIZEis1M

prompt(Forparallelquery).Thelargervaluethan1Mhavenotimprovedperformancesignificantly

promptcheckv$licenseandv$sort_usage

promptFromRevealNet:

promptINITIAL/NEXTparameteroftemporarytableshouldhaveminimumsizeSORT_AREA_SIZE+1block

promptSORT_AREA_RETAINED_SIZEsettohalftheSORT_AREA_SIZE

prompt<<<<<<<<<<<<<<<<<<<NOTE:>>>>>>>>>>>>>>>>>>>>>>

prompt

ttitleoff

prompt

prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++

prompt+7.1SEQUENCE_CACHE_ENTRIES

prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++

prompt

ttitleleft"***SEQUENCE_CACHE_ENTRIES***"Skip1

selectcount(*)"NumberofSequence",SUM(CACHE_SIZE)"CacheSizeNeeded"fromDBA_sequences

/

prompt

prompt<<<<<<<<<<<<<<<<<<<NOTE:>>>>>>>>>>>>>>>>>>>>>>

prompt7.1Invesigation

promptSEQUENCE_CACHE_ENTRIESshouldsetto1000

prompt<<<<<<<<<<<<<<<<<<<NOTE:>>>>>>>>>>>>>>>>>>>>>>

prompt

ttitleoff

prompt

prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++

prompt+9.0RollbackSegmentContention +共7页 第1页