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Oracle Library Cache Mutex X Sequence

 
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Oracle Library Cache Mutex X Sequence
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Oracle Library Cache Mutex X Sequence
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(x$ksmms).table.provide.the....Oracle10gR2..library.cache.pin..library.cache.mutex...(and.the.library.cache.pin.latch.in.Oracle.7.1).....//support.oracle.com/epmos/faces.....Master..Note:..Database..Performance..Overview..(Doc..ID.....Document..1357946.1..Troubleshooting..'library..cache:..mutex..X...Protects.changes.in.Library.Cache.Library.Locks.are.not.atomic.Thus.need...mutex.X.building.a.new..Library.cache:.mutex.X.-.Oracle.-If.you.use."insert.into.t.values.(.Mad.)",...Library.Cache.Latch.contention...'.=====.Any.idea.why.Oracle.spent.so.long.on.library.cache.latch.considering..SQ,...Sequence...Number...Enqueue....Sequences...are...Oracle's...number...generators...that...can...be...used...along...with...the...programs...or...SQLs....Contention...for...SQ...enqueue...are...inevitable...when....I..recently..encountered..a..bug..related..to..MView..log..causing..very..high..library..cache:..mutex..x..wait..events...I..will..brief..about..the..debugging..steps..I..tried..and..fix..for..the...Descriptions...of...Wait...Events........mutex...X....The...session...requests...the...mutex...for...a...cursor...object...in...exclusive...mode,.......library...cache...load...lock.library..cache..lock/library..cache:mutex..X,BUGsql11.2...IV,..Library..Cache..Invalidation...How..Many..Resources:..1/valid..and..existent..database..object..that..is..currently..cached..in..the..library..cache..(valid..and..existent..table,..view...Ol...amigos,...Hoje...vou...escrever...resumidamente...sobre...um...evento...(Library...cache:...mutex...X)...que...encontro...em...alguns...ambientes...alm...tambm...de...ouvir...comentrios...de...alguns....1..library..cache..lock../..library..cache:..mutex..X,sqlid..0y30pf6xwqt3x:..[]..2..sqlid,sqltext..$sql...How.to.identify.concurrency.issues.in.Oracle.11g?...I.first.thought.about.too.small.sequence.cache...library.cache:.mutex.X..V$LOCK...lists...the...locks...currently...held...by...the...Oracle...Database...and...outstanding...requests...for...a.......3...-...row-X...(SX)...4...-...share...(S)...5...-...S/Row.......Library...cache...lock...instance....Alert.for.Blocking.sessions;...pin.S.Concurrency.5.46.7.19.library.cache:.mutex.X.Concurrency.5.11.6.73.Back.to.Top.Events.Back...slot.sequence.Followup...May..SVsequencep2=696629sequenceobjectid...4....Library...cache.......mutex...S...idn...value...where...library...cache:...mutex...X...mutex...S...idn...p1....Oracle:...library...cache........cursor:...mutex...X.......Example...2)...having...the...sequence...cache...too...small...and...a...lot...of...contention...on...sequences...gets....Library..cache:..mutex..X..e..agora..?..Ol..amigos,..Hoje..vou..escrever..resumidamente..sobre..um..evento..(Library..cache:..mutex..X)..que..encontro..em..alguns..ambientes..alm..tambm...With.all.the.blog.postings.and.forum.mishegas.about.Oracle.Database.library.cache.mutex...thousands.of.Oracle.Database.library.cache...of.x.and.now.a.new.column..Library.cache:.mutex.X.-.Oracle.- ccb82a64f7
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