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 --- ...
视图的p1,p2,p3标识了对应的session正在等待的具体资源,p1text,p2text,p3text则是对p1,p2,p3的文字描述。 从Oracle 10g R1启,该视图的所有信息可以直接从v$session获得。 1)、state字段有四种含义﹕ a、Waiting:当前SESSION正等待这个事件。SECONDS_IN_WAIT表示已经等待的时间。 b、Waited unknown time:参数timed_...
一、视图V$SESSION_WAIT显示了session的当前等待事 二、视图V$SESSION_EVENT记录了session自启动起所有的事件
Oracle数据库报错繁忙00054解决 oracle之报错:ORA-00054:资源正忙,要求指定NOWAITORA-00054:资源正忙, 但指定以NOWAIT方式获取资源, 或者超时失效1.查询数据库中的锁 select...,serial’; 例如:1.select * from v$locked_object; 2.SELECT sid, serial#, username, osuser FROM v ...
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...
Oracle从7.0.12开始推出OWI,当时有104个等待事件,到9i发展到400个,到10g已发展到800个。事实上,10g的Enterprise Manager Performance中已经不再有buffer cache hit ratio。 OWI是一种用于定位process bottlenecks(即wait evennts)的方式,包括I/O,locks,latches,bk process activities,network latencies等等。它记录了所...
This section describes some of the more common Oracle events in more detail. alter system set dispatchers A session has issued a statement ALTER SYSTEM SET DISPATCHERS = string and is waiting for the dispatchers to get started. Wait Time: The session will wait 1 / 100 of a second and ch...
Oracle性能视图v$session_wait_session 1、表结构 SQL> desc v$session_event 名称 是否为空? 类型 --- --- --- SID NUMBER EVENT VARCHAR2(64) TOTAL_WAITS NUMBER TOTAL_TIMEOUTS NUMBER TIME_WAITED NUMBER AVERAGE_WAIT NUMBER MAX_WAIT NUMBER TIME_WAITED...
WAIT_CLASS :等待事件类名字 WAIT_TIME:如果会话正在等待,那么值为0,如果会话不在等待,那么值为>0,-1,-2. SECONDS_IN_WAIT:如果会话正在等待,这个值是总计 STATE:等待状态 WAIT_TIME_MICRO:等待时间的总计。如果会话在正在等待,那么值就是当前等待花费的时间,如果会话不在等待,那么这个值就是上次等待时间总和 ...
--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 ...