DB2 latch问题分析 1.需要从系统资源使用率迅速判断:高连接数、低效率,低资源使用,很可能是Lock 或者Latch 2. db2pd -db testdb -wlock #确认是否存在频繁锁等待 3. db2pd -db testdb -act #确认正在执行的SQL 4. db2pd -latch -rep 1 10 #确认是否存在Latch等待的问题 5. db2pd -stack all #抓取...
DSNWSPM measures the following areas of a specific SQL statement in your stored procedure: CPU time Latch/lock wait time Getpages Read I/Os Write I/Os The installation job DSNTIJRT installs and configures DSNWSPM. A final setup step for actual costs is to ensure that the DB2 accounting ...
Package detail for buffer manager, lock manager and SQL statistics. One of the following traces must also be activated before the IFCID 239 records are written: Accounting class 7 Accounting class 8 Monitor class 7 Monitor class 8 239 11 Plan-level accounting information. Class 11 is activated...
Drain Lock EventsEvents due to drain lock processing during the execution of the package or DBRM (Field name: QWACARND). Drain LockThe waiting time caused by drain lock processing (Field name: QWACAWDR). End User IDThe user ID of the end user's workstation (Field name: QWHCEUID).This...
LATCH LOCKPURPOSE: To easily reverse a latch even by a push-pull type handle, and automatically light and put out an indoor electric lamp by opening and closing of a door.FUKUDA KATSUYUKI福田 勝行
WDDM2 - LockConfirm Test - Mengonfirmasi Konten melalui BAR1 Pemberitahuan bingkai berkala WDDM2.2 - Batal pada perubahan mode - CPU tunggu Pemberitahuan bingkai berkala WDDM2.2 - Batal pada perubahan mode - GPU tunggu Pemberitahuan bingkai berkala WDDM2.2 - Beberapa bingkai di depan Pember...
AQS( AbstractQueuedSynchronizer )是一个用来构建锁和同步器(所谓同步,是指线程之间的通信、协作)的框架,Lock 包中的各种锁(如常见的 ReentrantLock, ReadWriteLock), concurrent 包中的各种同步器(如 CountDownLatch, Semaphore, CyclicBarrier)都是基于 AQS 来构建,所以...
InnoDB 事务锁多版本分析
thread status, and thread type, and to effectively reduce the amount of data that needs to be examined. For example, to view only the active threads in lock wait status, qualify the threadsby selecting the 1 field on the Db2 Thread Qualification Parameters window. Use the sort function ...
ロック待機時 間は,以下に 含まれる LOCKTIME パラメーターによ り指定されます. – IMS バッチ以外の環境の場合は,IMS-tm PROCLIB データ・セットの DFSVSMxx メンバー – IMS バッチの場合, DFSVSAMP DD ステートメン トによって指定されるデータ・セット 待機者を識別できず,カス...