Oracle视图V$CON_SYSTEM_WAIT_CLASSES用于展示每个连接会话在等待类别下的等待时间。这个视图存储每个会话会话等待类别的等待汇总信息,如CPU,其他CPU,网络,操作系统等。通过查询视图V$CON_SYSTEM_WAIT_CLASSES,管理者可以查看某个会话下的不同等待类别的等待时长。 使用V$CON_SYSTEM_WAIT_CLASSES的方法如
C Oracle Wait Events D Oracle Enqueue Names E Statistics Descriptions F Background Processes Index V$SESSION_WAIT_CLASSdisplays the time spent in various wait event operations on a per-session basis. ColumnDatatypeDescription SID NUMBER Session identifier ...
Changes in This Release for Oracle Database Reference Part I Initialization Parameters Part II Static Data Dictionary Views Part III Dynamic Performance Views 7 Dynamic Performance (V$) Views: V$ACCESS to V$HVMASTER_INFO 8 Dynamic Performance (V$) Views: V$IM_COLUMN_LEVEL to V$RULE_SET_AGGREGATE...
OracleDatabase- Enterprise Edition - Version 11.2.0.2andlater Informationinthis document appliestoanyplatform. SYMPTOMS UserSession shows ACTIVEwithevent"class slave wait". The session type shows BACKGROUND even though its ausersession. SID SERIAL# USERNAME PROGRAM TYPE PID SPID WAIT_TIME STATE --- ...
从Oracle 10g R1启,该视图的所有信息可以直接从v$session获得。 1)、state字段有四种含义﹕ a、Waiting:当前SESSION正等待这个事件。SECONDS_IN_WAIT表示已经等待的时间。 b、Waited unknown time:参数timed_statistics值为false时,无法确定等待时间。 c、Wait short time:表示发生了等待,且低于1厘秒,此情形下wait_ti...
官方指导: https://docs.oracle.com/javase/specs/jls/se7/html/jls-17.html 或者: https://learning.oreilly.com/library/view/the-java-language/9780133260335/ch17lev1sec2.htm 关于wait set Every object, in addition to having an associated monitor, has an associated wait set. A wait set is ...
系统视图Oracle 租户系统视图性能视图 V$SESSION_WAIT V$SESSION_WAIT 更新时间:2025-04-01 10:01:07 分享 说明 该视图从 V1.4 版本开始引入。功能描述展示当前租户在当前 OBServer 节点上所有 Session 的当前或者上一次等待事件的详细信息,包括等待事件名称、等待耗时等。
Oracle数据库报错繁忙00054解决 oracle之报错:ORA-00054:资源正忙,要求指定NOWAITORA-00054:资源正忙, 但指定以NOWAIT方式获取资源, 或者超时失效1.查询数据库中的锁 select...,serial’; 例如:1.select * from v$locked_object; 2.SELECT sid, serial#, username, osuser FROM v ...
EVENT_ID NUMBER Identifier of the wait event WAIT_CLASS_ID NUMBER Identifier of the class of the wait event WAIT_CLASS# NUMBER Number of the class of the wait event WAIT_CLASS VARCHAR2(64) Name of the class of the wait event分类: Oracle 性能优化 好文要顶 关注我 收藏该文 微信分享 Po...
--5 Oracle 10g还为我们提供了另外一个视图叫v$event_histogram 它标市了等待事件的周期以及会话等待某一特定事件周期的频度 select wait_time_milli,wait_count from v$event_histogram where event='enq: TX - row lock contention'; 结果如下: WAIT_TIME_MILLI WAIT_COUNT ...