实用的检查程序(3)
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<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 728x15, 创建于 08-4-23MSDN */google_ad_slot = "3624277373";google_ad_width = 728;google_ad_height = 15;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
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$sort_usage
promptFromRevealNet:
promptINITIAL/NEXTparameteroftemporarytableshouldhaveminimumsizeSORT_AREA_SIZE+1block
promptSORT_AREA_RETAINED_SIZEsettohalftheSORT_AREA_SIZE
prompt<<<<<<<<<<<<<<<<<<<NOTE:>>>>>>>>>>>>>>>>>>>>>>
prompt
ttitleoff
prompt
prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++
prompt+7.1SEQUENCE_CACHE_ENTRIES
prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++
prompt
ttitleleft"***SEQUENCE_CACHE_ENTRIES***"Skip1
selectcount(*)"NumberofSequence",SUM(CACHE_SIZE)"CacheSizeNeeded"fromDBA_sequences
/
prompt
prompt<<<<<<<<<<<<<<<<<<<NOTE:>>>>>>>>>>>>>>>>>>>>>>
prompt7.1Invesigation
promptSEQUENCE_CACHE_ENTRIESshouldsetto1000
prompt<<<<<<<<<<<<<<<<<<<NOTE:>>>>>>>>>>>>>>>>>>>>>>
prompt
ttitleoff
prompt
prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++
prompt+9.0RollbackSegmentContention +共7页 第1页
<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 728x15, 创建于 08-4-23MSDN */google_ad_slot = "3624277373";google_ad_width = 728;google_ad_height = 15;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 160x600, 创建于 08-4-23MSDN */google_ad_slot = "4367022601";google_ad_width = 160;google_ad_height = 600;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
prompt
prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++
prompt+7.0SortAreaSize +
prompt++++++++++++++++++++++++++++++++++Item++++++++++++++++++++++++++++++++++
prompt
ttitleleft"***SortArea***"Skip1
Selectsubstr(name,1,25) "SortAreaName",
substr(value,1,15)"Value"
fromv$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
<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 728x15, 创建于 08-4-23MSDN */google_ad_slot = "3624277373";google_ad_width = 728;google_ad_height = 15;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
<script type="text/javascript"><!--google_ad_client = "pub-2947489232296736";/* 160x600, 创建于 08-4-23MSDN */google_ad_slot = "4367022601";google_ad_width = 160;google_ad_height = 600;//--></script><script type="text/javascript"src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
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