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Oracle 中control_file_record_keep_time参数的解释

Oracle基于RMAN的备份方式，可分为以catalog和nocatalog的两种方式进行备份管理。其中，catalog的方式需要一个catalog目录数据库，这个数据库一般运行在另外一台服务器上，这种方式可以用于用户有多个Oracle数据库的环境，同时对数据库的备份恢复信息也可以长久的保存，也就是RMAN把对数据库...

开发笔记 ·2024-09-30

Web Performance Optimization

WebPerformanceOptimization 技术不断演进，包括： - LazyLoading:延迟加载非必要的资源，提升页面加载速度。- CodeSplitting:将代码拆分成更小的部分，按需加载。- HTTP/3:新一代HTTP协议，提升了网络传输性能和安...

开发笔记 ·2024-08-31

keepalivetime

keepalivetime是一个与计算机网络相关的术语，它表示在TCP连接中，一个空闲连接在被关闭之前可以保持活跃的时间，这个时间段通常用于在没有数据传输时节省资源，以及在网络状况不佳时确保连接的可靠性。...

开发笔记 ·2024-06-21

ORA-32150: Cannot perform operation on a null timestamp

文档解释ORA-32150:CannotperformoperationonanulltimestampCause:Thetimestampinvolvedinthisoperationisnull.Action:Usevalid,non-nulltimestampinstancetoperformthisoperat...

IT技术学习 ·2023-07-28

ORA-26761: Standby Redo Logs not available for real time mining

文档解释ORA-26761:StandbyRedoLogsnotavailableforrealtimeminingCause:StandbyRedoLogsrequiredforrealtimeminingbydownstreamcaptureprocesswerenotavailable.Action:Checkt...

IT技术学习 ·2023-07-28

ORA-25033: triggers cannot be executed at this time

文档解释ORA-25033:triggerscannotbeexecutedatthistimeCause:Anattemptwasmadetoexecuteatriggerwhenthesessionwasalmostfinished.Action:DonotattempttoDMLwithtriggersthata...

IT技术学习 ·2023-07-28

ORA-25228: timeout or end-of-fetch during message dequeue from string.string

文档解释ORA-25228:timeoutorend-of-fetchduringmessagedequeuefromstring.stringCause:User-specifieddequeuewaittimehaspassedortheendofthequeuehasbeenreachedbutnomessage...

IT技术学习 ·2023-07-28

ORA-16051: parameter string contains an invalid delay time

文档解释ORA-16051:parameterstringcontainsaninvaliddelaytimeCause:ThevalueforthespecifiedLOG_ARCHIVE_DEST_n(n=1…31)parametercontainedaDELAYattributewithaninval...

IT技术学习 ·2023-07-28

ORA-56921: invalid time zone version

文档解释ORA-56921:invalidtimezoneversionCause:Invalidtimezoneversionpassed.Action:Checkandcorrectthetimezoneversion.ORA-56921:invalidtimezoneversion表示您尝试使用的时区版本无效或不...

IT技术学习 ·2023-07-28

ORA-15217: missing or invalid timeout value after DROP AFTER

文档解释ORA-15217:missingorinvalidtimeoutvalueafterDROPAFTERCause:ThecommanddidnotspecifyavalidtimeoutvalueaftertheDROPAFTERclause.Action:Specifyavalidtimeoutvaluea...

IT技术学习 ·2023-07-28

ORA-24073: cannot specify RETENTION_TIME on exception queue string.string

文档解释ORA-24073:cannotspecifyRETENTION_TIMEonexceptionqueuestring.stringCause:Anattemptwasmadetocreateoralteranexceptionqueuebyspecifyinganon-zeroRETENTION_TIME.A...

IT技术学习 ·2023-07-28

ORA-56923: database properties related to time zone version are not set up properly

文档解释ORA-56923:databasepropertiesrelatedtotimezoneversionarenotsetupproperlyCause:Therewerenodatabasepropertiesrelatedtotimezoneversionindictionarytablesys.props...

IT技术学习 ·2023-07-27

ORA-07454: queue timeout, string second(s), exceeded

文档解释ORA-07454:queuetimeout,stringsecond(s),exceededCause:Usersessionqueuedforlongerthanmaximumspecifiedqueuequeuedurationtimeforconsumergroup.Action:Re-submitjo...

IT技术学习 ·2023-07-27

ORA-38865: cannot create restore point for a future SCN or time.

文档解释ORA-38865:cannotcreaterestorepointforafutureSCNortime.Cause:AnattemptwasmadetocreatearestorepointwithanSCNortimestampthatisinthefuture.Action:RevisetheSCNor...

IT技术学习 ·2023-07-26

ORA-29300: ORACLE error, tablespace point-in-time recovery

文档解释ORA-29300:ORACLEerror,tablespacepoint-in-timerecoveryCause:AnotherORACLEerroroccuredintheDBMS_PITRpackage.Action:Seethetextoftheerrormessageforadescriptiono...

IT技术学习 ·2023-07-26