Oracle Database - Enterprise Edition - Version 11.2.0.1 and later: Many sessions hang waiting for 'library cache lock' While the blocker is in 'Not in wait' status d
如果多个进程间发生了死锁,也可能发生WAITED TOO LONG FOR A ROW CACHE ENQUEUE LOCK! 等待。但是,row cache lock没有自动检测死锁机制,不会像ORA-60(Enqueue )、ORA-4020/ORA-4021(Library cache lock)一样报出错误信息和自动解除死锁。所以,当发生WAITED TOO LONG FOR A ROW CACHE ENQUEUE LOCK! 等待死锁时...
Макрос ExReleasePushLockShared Функция ExReleaseResourceAndLeaveCriticalRegion Функция ExReleaseResourceForThreadLite Функция ExReleaseResourceLite Функция ExReleaseRundownProtection Функция ExReleaseRundownProtectionCacheAware Функция ExReleaseRun...
library cache load lock object address lock address 10*mask+namespace library cache lock handle address lock address 10*mode+namespace library cache pin handle address pin address 10*mode+namespace lock manager wait for remote message waittime not used not used log buffer...
REQUEST_FOR_DEADLOCK_SEARCH 在死锁监视器等待开始下一次死锁搜索时出现。 在两次死锁检测之间可能出现该等待,长时间等待此资源并不指示出现问题。 RESMGR_THROTTLED 在有新请求传入并且基于 GROUP_MAX_REQUESTS 设置而中止时出现。 RESOURCE_QUEUE 在同步不同的内部资源队列期间出现。 RESOURCE_SEMAPHOR...
Sessions are hanging waiting for "library cache pin" while executing a PL/ SQL package which performs a MERGE The Merge is executed in Parallel The sessions are blocked by each other as seen below :select sid,inst_id,event,blocking_session from gv$session;...
NODE_CACHE_MUTEX 仅供内部使用。 OLEDB 当SQL Server 调用 SNAC OLE DB 提供程序 (SQLNCLI) 或 Microsoft OLE DB Driver for SQL Server (MSOLEDBSQL) 时发生。 此等待类型不用于同步。 而是用于指示调用 OLE DB 访问接口的持续时间。 ONDEMAND_TASK_QUEUE 在后台...
However, for other objects, such as mutexes, if it has a name, the WCT API will report that name. To get the most out of the WCT API, you’ll always want to name your handles so you can see exactly what’s causing your deadlock. Of course, if you’re naming handles, those ...
~SynchronizedCache{if(cacheLock !=null) cacheLock.Dispose;}} 参考:ReaderWriterLockSlim 微软官网文章。 2.3、动态计数锁 1、动态计数锁:CountdownEvent 限制线程数的一个机制,而且这个也是比较常用的(同属于信号量的一种)。 varcde =newCountdownEvent(10); ...
REQUEST_FOR_DEADLOCK_SEARCH 在死結監視器等候開始下個死結搜尋時發生。這個等候應該在兩次死結偵測之間發生,在此資源上的等候時間如果很長,並不表示發生任何問題。 RESMGR_THROTTLED 當新的要求送入,然後根據 GROUP_MAX_REQUESTS 設定降低速度。 RESOURCE_QUEUE ...