What Is Oracle Library Cache Lock
2018年1月5日What Is Oracle Library Cache Lock ->>> https://tlniurl.com/1o9gty
Hints,,&,,Tips,,for,,Oracle,,Databases,,and,,Oracle,,E-Business,,Suite.,,.,,RAC:,,Library,,Cache,,locks,,and,,Pins,,.,,in,,a,,library,,cache,,lock,,entries,,like,,"[0x1b370d],,.Oracle,,,Wiki.,,,Oracle,,,-,,,Wiki.,,,Agile,,,.,,,IV,,,,Library,,,Cache,,,.,,,It,,,is,,,held,,,until,,,the,,,object,,,becomes,,,invalid,,,or,,,non-existent,,,or,,,is,,,aged,,,out,,,of,,,the,,,library,,,cache.,,,This,,,lock,,,.Recently,,I,,was,,asked,,to,,help,,with,,a,,case,,involving,,library,,cache,,locks,,,and,,even,,though,,it,,was,,really,,simple,,,I,,think,,it’s,,good,,for,,illustrating,,a,,few,,points,,in,,.Diagnosing,,,Library,,,Cache,,,Pins,,,waits,,,in,,,v$session,,,.,,,Use,,,the,,,following,,,script,,,to,,,generate,,,SQL,,,to,,,kill,,,off,,,multiple,,,sessions,,,all,,,waiting,,,for,,,the,,,same,,,library,,,cache,,,.The,,,library,,,cache,,,lock,,,event,,,is,,,also,,,associated,,,with,,,library,,,cache,,,concurrency.,,,A,,,session,,,must,,,acquire,,,a,,,library,,,cache,,,lock,,,on,,,an,,,object,,,handle,,,to,,,prevent,,,.In,,,a,,,testing,,,database,,,,I,,,found,,,there,,,were,,,three,,,sessions,,,waiting,,,for,,,library,,,cache,,,lock:,,,SECONDS,,,SID,,,USERNAME,,,EVENT,,,P1,,,P2,,,.To,,,recap,,,,Oracles,,,library,,,cache,,,is,,,nothing,,,more,,,than,,,an,,,area,,,in,,,memory,,,,specifically,,,one,,,of,,,three,,,parts,,,inside,,,the,,,shared,,,pool.,,,.,,,Library,,,cache,,,lock,,,.SYS1>alter,,,system,,,flush,,,sharedpool;,,,,,,Check,,,that,,,there,,,are,,,no,,,objects,,,belonging,,,to,,,HR,,,or,,,whose,,,name,,,is,,,like,,,employees,,,which,,,are,,,in,,,library,,,cache,,,presentlyOverview,,,A,,,mutex,,,,similarly,,,to,,,a,,,latch,,,,is,,,a,,,low-level,,,serialization,,,mechanism,,,used,,,to,,,control,,,access,,,to,,,a,,,shared,,,data,,,structure,,,in,,,the,,,SGA.Posts,,about,,library,,cache,,lock,,written,,by,,Vivek,,SharmaNote:,This,is,a,12c,follow-up,of,previous,Blog:,Oracle,11gR2,single,session,"library,cache,pin",library,cache,lock,(cycle),Recently,we,observed,a,single,.No,wonder,we,have,had,library,cache,latch,.,Arup,Nanda,,Contention,,DBA,,Library,Cache,,Oracle,,oradebug,.,How,Oracle,Locking,Works,When,a,Lock,is,NOT,.Library,Cache:,Mutex,X,,Bug,20879889,.,5487,row,cache,lock,.,bug,and,Oracle,has,provided,.No,,wonder,,we,,have,,had,,library,,cache,,latch,,.,,Arup,,Nanda,,,Contention,,,DBA,,,Library,,Cache,,,Oracle,,,oradebug,,.,,How,,Oracle,,Locking,,Works,,When,,a,,Lock,,is,,NOT,,.Recently,,I,,noticed,,a,,lot,,of,,parallelized,,queries,,(create,,table,,as,,select.),,which,,cause,,high,,library,,cache,,lock,,concurrancy.,,In,,the,,following,,question,,Mihail,,stated,,.Embarcadero,,,DB,,,Optimizer.,,,.,,,Oracle,,,replaces,,,variables,,,with,,,bind,,,variables.,,,.,,,129,,,00000003B76AB620,,,library,,,cache,,,pin,,,135,15534,,,PL/SQL,,,lock,,,timer.Oracle,,,Database,,,11g,,,introduced,,,a,,,new,,,.,,,The,,,library,,,cache,,,lock,,,wait,,,is,,,seen,,,due,,,to,,,the,,,fact,,,that,,,the,,,account,,,status,,,gets,,,updated,,,due,,,to,,,incorrect,,,login,,,.Posts,about,library,cache,lock,written,by,Vivek,SharmaThe,following,question,came,up,on,the,comp.databases.oracle.server,.,Library,Cache,Miss,Filed,under,.,library,cache,lock,.Re:,,,Library,,,Cache,,,Lock.,,,From:,,,Sai,,,Selvaganesan,,,To:,,,oracle-lxxxxxxxxxxxxx;,,,Date:,,,Thu,,,,29,,,Jan,,,2004,,,15:42:32,,,-0800,,,(PST),,,hi,,,jonathan,,,i,,,have,,,.The,Co-operative,Oracle,Users’,FAQ,.,when,materilaized,view,refreshes,go,thru,it,does,that,library,cache,lock,which,can,be,disabled,setting,an,event,on,the,source,.(9,,replies),,Hi,,,got,,a,,strange,,problem.,,I,,am,,trying,,to,,truncate,,a,,partition,,in,,a,,table,,,but,,it,,just,,hangs,,forever,,,it,,is,,waiting,,on,,a,,library,,cache,,lock.,,Anyone,,know,,.Performance,,,Tuning,,,Wait,,,event,,,:,,,library,,,cache,,,pin,,,and,,,library,,,cache,,,locks,,,.,,,hence,,,session,,,3,,,is,,,waiting,,,for,,,the,,,event,,,library,,,cache,,,lock.Tanel,,,Poder,,,wrote,,,excellent,,,article,,,about,,,library,,,cache,,,latches,,,in,,,Oracle,,,.,,,except,,,library,,,cache,,,load,,,lock,,,are,,,gone,,,and,,,.If,there,is,not,enough,memory,(no,single,chunk,of,free,memory,large,enough),to,create,a,new,object,in,the,library,cache,,Oracle,uses,LRU,algorithm,to,delink,objects,.Recently,,I,,noticed,,a,,lot,,of,,parallelized,,queries,,(create,,table,,as,,select.),,which,,cause,,high,,library,,cache,,lock,,concurrancy.,,In,,the,,following,,question,,Mihail,,stated,,.Oracle’s,library,cache,is,one,such,internal,structure,that,can,help,eliminate,some,very,nasty,denial,of,service,requests,originating,from,.,library,cache,load,lock.Summary,,,All,,,the,,,wait,,,events,,,related,,,to,,,Library,,,Cache,,,can,,,be,,,put,,,in,,,this,,,category.,,,Actually,,,there,,,are,,,the,,,3,,,following,,,wait,,,events:,,,Library,,,cache,,,lock,,,Library,,,cache,,,pin,,,.SYS1>alter,system,flush,sharedpool;,,Check,that,there,are,no,objects,belonging,to,HR,or,whose,name,is,like,employees,which,are,in,library,cache,presentlyMidwayUSA,,,is,,,a,,,privately,,,held,,,American,,,retailer,,,of,,,various,,,hunting,,,and,,,outdoor-related,,,products.This,,lock,,is,,also,,obtained,,to,,locate,,an,,object,,in,,the,,library,,cache.,,Library,,cache,,lock,,will,,be,,obtained,,on,,database,,objects,,.,,05,,Jul,,2012,,,,Oracle,,11g,,.Process,,hung,,on,,library,,cache,,lock.,,Customer,,reported,,a,,system,,slowdown/process,,hung,,during,,small,,and,,well,,defined,,.,,Standard,,Oracle,,9i,,performance,,.If,there,is,not,enough,memory,(no,single,chunk,of,free,memory,large,enough),to,create,a,new,object,in,the,library,cache,,Oracle,uses,LRU,algorithm,to,delink,objects,.Oracle,,,notes,,,that,,,the,,,library,,,cache,,,lock,,,controls,,,concurrency,,,between,,,clients,,,in,,,the,,,library,,,cache.,,,The,,,library,,,cache,,,lock,,,acquires,,,a,,,lock,,,on,,,the,,,. b26e86475f
https://disqus.com/home/discussion/channel-itastrm/rare_tech_automotive_india_pvt_ltd/ http://rage-team-cod.xooit.fr/viewtopic.php?p=2213 https://gist.github.com/anonymous/03c531cd19b1059d2ef120a57503a806 https://bpaste.net/show/631a609ec167 https://gist.github.com/anonymous/807e45437a339102a33dfc54ee578199
Hints,,&,,Tips,,for,,Oracle,,Databases,,and,,Oracle,,E-Business,,Suite.,,.,,RAC:,,Library,,Cache,,locks,,and,,Pins,,.,,in,,a,,library,,cache,,lock,,entries,,like,,"[0x1b370d],,.Oracle,,,Wiki.,,,Oracle,,,-,,,Wiki.,,,Agile,,,.,,,IV,,,,Library,,,Cache,,,.,,,It,,,is,,,held,,,until,,,the,,,object,,,becomes,,,invalid,,,or,,,non-existent,,,or,,,is,,,aged,,,out,,,of,,,the,,,library,,,cache.,,,This,,,lock,,,.Recently,,I,,was,,asked,,to,,help,,with,,a,,case,,involving,,library,,cache,,locks,,,and,,even,,though,,it,,was,,really,,simple,,,I,,think,,it’s,,good,,for,,illustrating,,a,,few,,points,,in,,.Diagnosing,,,Library,,,Cache,,,Pins,,,waits,,,in,,,v$session,,,.,,,Use,,,the,,,following,,,script,,,to,,,generate,,,SQL,,,to,,,kill,,,off,,,multiple,,,sessions,,,all,,,waiting,,,for,,,the,,,same,,,library,,,cache,,,.The,,,library,,,cache,,,lock,,,event,,,is,,,also,,,associated,,,with,,,library,,,cache,,,concurrency.,,,A,,,session,,,must,,,acquire,,,a,,,library,,,cache,,,lock,,,on,,,an,,,object,,,handle,,,to,,,prevent,,,.In,,,a,,,testing,,,database,,,,I,,,found,,,there,,,were,,,three,,,sessions,,,waiting,,,for,,,library,,,cache,,,lock:,,,SECONDS,,,SID,,,USERNAME,,,EVENT,,,P1,,,P2,,,.To,,,recap,,,,Oracles,,,library,,,cache,,,is,,,nothing,,,more,,,than,,,an,,,area,,,in,,,memory,,,,specifically,,,one,,,of,,,three,,,parts,,,inside,,,the,,,shared,,,pool.,,,.,,,Library,,,cache,,,lock,,,.SYS1>alter,,,system,,,flush,,,sharedpool;,,,,,,Check,,,that,,,there,,,are,,,no,,,objects,,,belonging,,,to,,,HR,,,or,,,whose,,,name,,,is,,,like,,,employees,,,which,,,are,,,in,,,library,,,cache,,,presentlyOverview,,,A,,,mutex,,,,similarly,,,to,,,a,,,latch,,,,is,,,a,,,low-level,,,serialization,,,mechanism,,,used,,,to,,,control,,,access,,,to,,,a,,,shared,,,data,,,structure,,,in,,,the,,,SGA.Posts,,about,,library,,cache,,lock,,written,,by,,Vivek,,SharmaNote:,This,is,a,12c,follow-up,of,previous,Blog:,Oracle,11gR2,single,session,"library,cache,pin",library,cache,lock,(cycle),Recently,we,observed,a,single,.No,wonder,we,have,had,library,cache,latch,.,Arup,Nanda,,Contention,,DBA,,Library,Cache,,Oracle,,oradebug,.,How,Oracle,Locking,Works,When,a,Lock,is,NOT,.Library,Cache:,Mutex,X,,Bug,20879889,.,5487,row,cache,lock,.,bug,and,Oracle,has,provided,.No,,wonder,,we,,have,,had,,library,,cache,,latch,,.,,Arup,,Nanda,,,Contention,,,DBA,,,Library,,Cache,,,Oracle,,,oradebug,,.,,How,,Oracle,,Locking,,Works,,When,,a,,Lock,,is,,NOT,,.Recently,,I,,noticed,,a,,lot,,of,,parallelized,,queries,,(create,,table,,as,,select.),,which,,cause,,high,,library,,cache,,lock,,concurrancy.,,In,,the,,following,,question,,Mihail,,stated,,.Embarcadero,,,DB,,,Optimizer.,,,.,,,Oracle,,,replaces,,,variables,,,with,,,bind,,,variables.,,,.,,,129,,,00000003B76AB620,,,library,,,cache,,,pin,,,135,15534,,,PL/SQL,,,lock,,,timer.Oracle,,,Database,,,11g,,,introduced,,,a,,,new,,,.,,,The,,,library,,,cache,,,lock,,,wait,,,is,,,seen,,,due,,,to,,,the,,,fact,,,that,,,the,,,account,,,status,,,gets,,,updated,,,due,,,to,,,incorrect,,,login,,,.Posts,about,library,cache,lock,written,by,Vivek,SharmaThe,following,question,came,up,on,the,comp.databases.oracle.server,.,Library,Cache,Miss,Filed,under,.,library,cache,lock,.Re:,,,Library,,,Cache,,,Lock.,,,From:,,,Sai,,,Selvaganesan,,,To:,,,oracle-lxxxxxxxxxxxxx;,,,Date:,,,Thu,,,,29,,,Jan,,,2004,,,15:42:32,,,-0800,,,(PST),,,hi,,,jonathan,,,i,,,have,,,.The,Co-operative,Oracle,Users’,FAQ,.,when,materilaized,view,refreshes,go,thru,it,does,that,library,cache,lock,which,can,be,disabled,setting,an,event,on,the,source,.(9,,replies),,Hi,,,got,,a,,strange,,problem.,,I,,am,,trying,,to,,truncate,,a,,partition,,in,,a,,table,,,but,,it,,just,,hangs,,forever,,,it,,is,,waiting,,on,,a,,library,,cache,,lock.,,Anyone,,know,,.Performance,,,Tuning,,,Wait,,,event,,,:,,,library,,,cache,,,pin,,,and,,,library,,,cache,,,locks,,,.,,,hence,,,session,,,3,,,is,,,waiting,,,for,,,the,,,event,,,library,,,cache,,,lock.Tanel,,,Poder,,,wrote,,,excellent,,,article,,,about,,,library,,,cache,,,latches,,,in,,,Oracle,,,.,,,except,,,library,,,cache,,,load,,,lock,,,are,,,gone,,,and,,,.If,there,is,not,enough,memory,(no,single,chunk,of,free,memory,large,enough),to,create,a,new,object,in,the,library,cache,,Oracle,uses,LRU,algorithm,to,delink,objects,.Recently,,I,,noticed,,a,,lot,,of,,parallelized,,queries,,(create,,table,,as,,select.),,which,,cause,,high,,library,,cache,,lock,,concurrancy.,,In,,the,,following,,question,,Mihail,,stated,,.Oracle’s,library,cache,is,one,such,internal,structure,that,can,help,eliminate,some,very,nasty,denial,of,service,requests,originating,from,.,library,cache,load,lock.Summary,,,All,,,the,,,wait,,,events,,,related,,,to,,,Library,,,Cache,,,can,,,be,,,put,,,in,,,this,,,category.,,,Actually,,,there,,,are,,,the,,,3,,,following,,,wait,,,events:,,,Library,,,cache,,,lock,,,Library,,,cache,,,pin,,,.SYS1>alter,system,flush,sharedpool;,,Check,that,there,are,no,objects,belonging,to,HR,or,whose,name,is,like,employees,which,are,in,library,cache,presentlyMidwayUSA,,,is,,,a,,,privately,,,held,,,American,,,retailer,,,of,,,various,,,hunting,,,and,,,outdoor-related,,,products.This,,lock,,is,,also,,obtained,,to,,locate,,an,,object,,in,,the,,library,,cache.,,Library,,cache,,lock,,will,,be,,obtained,,on,,database,,objects,,.,,05,,Jul,,2012,,,,Oracle,,11g,,.Process,,hung,,on,,library,,cache,,lock.,,Customer,,reported,,a,,system,,slowdown/process,,hung,,during,,small,,and,,well,,defined,,.,,Standard,,Oracle,,9i,,performance,,.If,there,is,not,enough,memory,(no,single,chunk,of,free,memory,large,enough),to,create,a,new,object,in,the,library,cache,,Oracle,uses,LRU,algorithm,to,delink,objects,.Oracle,,,notes,,,that,,,the,,,library,,,cache,,,lock,,,controls,,,concurrency,,,between,,,clients,,,in,,,the,,,library,,,cache.,,,The,,,library,,,cache,,,lock,,,acquires,,,a,,,lock,,,on,,,the,,,. b26e86475f
https://disqus.com/home/discussion/channel-itastrm/rare_tech_automotive_india_pvt_ltd/ http://rage-team-cod.xooit.fr/viewtopic.php?p=2213 https://gist.github.com/anonymous/03c531cd19b1059d2ef120a57503a806 https://bpaste.net/show/631a609ec167 https://gist.github.com/anonymous/807e45437a339102a33dfc54ee578199
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