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:: Latch Library Cache P1 P2 P3 ::

 
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MessagePosté le: Sam 6 Jan - 00:50 (2018)    Sujet du message: Latch Library Cache P1 P2 P3 Répondre en citant




Latch Library Cache P1 P2 P3
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ASH,Masters,Kyle,Hailey,.,Library,cache,RAC,(GES),RAC,(CR,and,CUR,.,w.p1,p1,,w.p2,p2,,w.p3,p3,from,v$session,s,,v$session,.10gR2,new,library,cache,latch,mechanism,that,replace,latches,and,.,group,by,p1,,p2;,.,nvl(rc.name,tochar(ash.p3)),rowcachefrom,v$activesession,.Resolving,,,the,,,Latch,,,.,,,If,,,it,,,Is,,,caused,,,by,,,shared,,,pool,,,or,,,library,,,cache,,,latching,,,(these,,,latches,,,.,,,,,,,secondsinwait,,,,waittime,,,,p1,,,,,,,p2,,,,p3,,,.oracle,library,cache,pinlibrary,cache,lock,.,as,a,latch,or,an,enqueue,,it,is,.,v$sessionp1p2p3p1rawp1,.Cache,,,Buffer,,,Chain,,,Latch,,,.,,,FIND,,,HOT,,,BLOCK,,,s,,,elect,,,SID,PID,EVENT,P1,P1TEXT,P2,P2TEXT,P3,P3TEXT,,,from,,,v$sessionwait,,,.Oracle,,Wait,,Events,,Introduction.,,.,,The,,columns,,P1,,,P2,,,and,,P3,,represent,,parameters,,for,,the,,wait,,event.,,.,,library,,cache,,load,,lock.Description,,,of,,,Oracle7,,,Wait,,,Events,,,and,,,Enqueues,,,.,,,parameters,,,(p1,,,,p2,,,and,,,p3),,,.,,,latch,,,free,,,address,,,number,,,tries,,,library,,,cache,,,load,,,lock,,,object,,,address,,,lock,,,address,,,.Temporary,tablespace,SS,Contention,In,RAC,.,,,'library,cache,lock',,'latch:,cache,.Library,,,cache,,,latches,,,gone,,,in,,,Oracle,,,.,,,110228084020-phpapp01.pdf,,,and,,,try,,,to,,,make,,,use,,,of,,,p1/p2/p3,,,of,,,wait,,,event,,,library,,,cache:,,,.The,,,Library,,,is,,,currently,,,in,,,the,,,process,,,of,,,.,,,Buffer,,,busy,,,waits,,,happens,,,when,,,a,,,session,,,tries,,,to,,,access,,,a,,,block,,,in,,,the,,,buffer,,,cache,,,but,,,it,,,.,,,p1,,,,p2,,,,p3,,,FROM,,,v,,,.Latch,,parent,,and,,child,,Mutex,,Segment,,stats,,x,,8,,Dictionary,,cache,,Library,,cache,,RAC,,(GES),,RAC,,(CR,,and,,CUR,,served),,RAC,,(cache,,xfer,,x,,2),,.Several,times,we've,seen,concurrency,event,"Library,cache:,.,the,library,cache,latches,were,replaced,by,mutexes,,..,,,parameter2,,,,parameter3,,,from,,,v$eventname,,,where,,,name,,,in,,,(select,,,event,,,from,,,v$sessionwait,,,where,,,(p1,p2,p3),,,in,,,(select,,,p1,,,,p2,,,,.library,,cache,,lock,,.,,SQL,,>,,SELECT,,sid,,,username,,,event,,,p1text,,,p1,,,p2text,,,p2,,,p3text,,,p3,,,secondsinwait,,2,,.Customer,,,reported,,,a,,,system,,,slowdown/process,,,hung,,,during,,,small,,,and,,,well,,,defined,,,period,,,of,,,time,,,and,,,it,,,was,,,related,,,to,,,one,,,specific,,,process,,,only.Sifting,,,through,,,the,,,ASHes,,,.,,,,,,Event,,,,P1,,,,P2,,,,P3,,,ySQL,,,.,,,latch:,,,library,,,cache,,,642,247,,,157,188,,,29.46,,,Concurrency,,,latch:,,,cache,,,buffers,,,.Temporary,,tablespace,,SS,,Contention,,In,,RAC,,.,,,,,'library,,cache,,lock',,,'latch:,,cache,,..,parameter2,,parameter3,from,v$eventname,where,name,in,(select,event,from,v$sessionwait,where,(p1,p2,p3),in,(select,p1,,p2,,.Temporary,tablespace,SS,Contention,In,RAC,.,,,'library,cache,lock',,'latch:,cache,.MidwayUSA,is,a,privately,held,American,retailer,of,various,hunting,and,outdoor-related,products.DBA-Village,,contains,,news,,,.,,Top,,Event,,P1/P2/P3,,Values,,.,,row,,cache,,objects,,3.65,,"5101607408","199","0",,3.47,,address,,number,,tries,,latch:,,library,,cache,,1.63,,..,parameter2,,parameter3,from,v$eventname,where,name,in,(select,event,from,v$sessionwait,where,(p1,p2,p3),in,(select,p1,,p2,,.DBA-Village,,contains,,news,,,.,,Top,,Event,,P1/P2/P3,,Values,,.,,row,,cache,,objects,,3.65,,"5101607408","199","0",,3.47,,address,,number,,tries,,latch:,,library,,cache,,1.63,,.DBA-Village,,,contains,,,news,,,,.,,,Top,,,Event,,,P1/P2/P3,,,Values,,,.,,,row,,,cache,,,objects,,,3.65,,,"5101607408","199","0",,,3.47,,,address,,,number,,,tries,,,latch:,,,library,,,cache,,,1.63,,,.Session,,Snapper,,on,,duty,,.,,SEQ#,,SECINSTATE,,P1,,P2,,P3,,P1TRANSL,,.,,latch:,,library,,cache,,.row,,cache,,lock/dcusers??,,oracle,,11g,,solaris,,10,,Members;,,Search,,.I,encountered,few,customer,issues,centered,around,library,cache,lock,and,library,cache,.,Librarycachelocksandlibrarycache,.,P1,P2,P3,P1RAW,..,,,SQL>,,,select,,,sid,blockingsession,p1,p1raw,p2,p3,,,.,,,0,,,latch:,,,shared,,,pool,,,1137,,,20,,,832829180,,,0000000031A3F6FC,,,831962136,,,3.2728E+14,,,library,,,cache,,,pin,,,.Oracle,Database,RAC,Diagnostics,and,Tuning.,By:,.,--,To,find,out,what,the,p1,,p2,,and,p3,indicates,see,the,next,section.,.,[,'library,cache',latch,].The,,,Oracle,,,library,,,cache,,,pin,,,wait,,,.,,,library,,,cache,,,pin,,,are,,,described,,,here:,,,P1,,,Address,,,of,,,the,,,object,,,being,,,examined,,,or,,,loaded;,,,P2,,,Address,,,of,,,the,,,load,,,lock;,,,P3,,,.Oracle,11g,and,Expert,Systems,Technology.,.,and,w.p2,=,l.latch#,.,If,you,see,a,large,number,of,processes,waiting,for,the,library,cache,or,library,cache,pin,latch,,.library,cache,pinP1KGL,Handle,AddressP2Pin,AddressP3,.,P1P2,library,cache,pin,.,LatchLibrary,Cache,Latch,.To,find,out,the,CBC,latch,,check,the,P1,,.,I,hope,this,helped,you,understanding,and,resolving,Cache,Buffer,Chains,Latch,related,waits.Fix,,,high,,,"cache,,,buffer,,,chain",,,waits,,,.,,,The,,,other,,,buffer,,,cache,,,latch,,,type,,,is,,,the,,,cache,,,.,,,SEQ#,,,SID,,,USERNAME,,,EVENT,,,P1,,,P2,,,.Library,,Cache,,Latch,,contention,,can,,occur,,if,,there,,are,,.,,the,,amount,,of,,time,,a,,Library,,Cache,,child,,latch,,is,,.,,b>p1=24488193544,,p2=199,,p3=0,,.Several,,times,,we've,,seen,,concurrency,,event,,"Library,,cache:,,.,,the,,library,,cache,,latches,,were,,replaced,,by,,mutexes,,,.Description,,of,,Oracle7,,Wait,,Events,,and,,Enqueues,,.,,parameters,,(p1,,,p2,,and,,p3),,.,,latch,,free,,address,,number,,tries,,library,,cache,,load,,lock,,object,,address,,lock,,address,,.Waits,on,the,cache,buffer,chains,latch,,.,to,get,more,information,by,looking,at,P1,,P2,and,P3,for,the,CBC,latch,.,Latch,FreeLibrary,cache,. b26e86475f
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MessagePosté le: Sam 6 Jan - 00:50 (2018)    Sujet du message: Publicité

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