2、v$system_wait_class displays the instance-wide time totals for each registered wait class. 等待事件类别的统计信息(系统级)。通过这一视图,可从全局角度了解系统那类操作等待较多。 3、v$system_event 等待事件的统计信息(系统级)。展开来说,是提供了自实例启动后各个等待事件的概括。常用于获取系统等待信息...
V$EVENT_NAMEdisplays information about wait events. 字段解释 EVENT# :事件号 EVENT_ID:事件ID NAME:事件名称 PARAMETER1,PARAMETER2,PARAMETER3:等待事件相关的3个参数 WAIT_CLASS_ID:等待事件的所属类ID WAIT_CLASS#:等待事件的类号 WAIT_CLASS:等待事件类型 DISPLAY_NAME(12c):等待事件对应更清晰的描述 CON_...
2.v$system_wait_class视图和v$system_event视图比较 v$system_wait_class视图是10g新增的,该视图是对类型等待时间的统计。v$system_event视图可以与v$system_wait_class视图结合查看。 v$system_wait_class视图和v$system_event视图的来源不同,可用v$fixed_view_definition视图查看视图的具体定义,如下所示: SELECT * F...
2、v$system_wait_class displays the instance-wide time totals for each registered wait class. 等待事件类别的统计信息(系统级)。通过这一视图,可从全局角度了解系统那类操作等待较多。 3、v$system_event 等待事件的统计信息(系统级)。展开来说,是提供了自实例启动后各个等待事件的概括。常用于获取系统等待信息...
WAIT_CLASS_ID NUMBER WAIT_CLASS# NUMBER WAIT_CLASS VARCHAR2(64) 1.3 查看等待事件分类情况 SELECT wait_class#, wait_class_id, wait_class, COUNT ( * ) AS "count" FROM v$event_name GROUP BY wait_class#, wait_class_id, wait_class ...
SQL_ID) report target: Defaults to NULL: (% and _ wildcards allowed) SQL report target specified: Specify WAIT_CLASS name (eg: from V$EVENT_NAME.WAIT_CLASS) report target: [Enter 'CPU' to investigate CPU usage] Defaults to NULL: (% and _ wildcards allowed) WAIT_CLASS report target ...
b wait_class = User I/O group by a session_id decode(session_type background session_type c username) a program b name) SQL语句响应时间分析 在Oracle i数据库中查看SQL语句的响应时间就变得比较容易了 现在在Oracle g中 DBA们拥有更多的工具可以帮助他们跟踪效率低下的数据库代码以前可以用来查询的视图...
I am looking for details about the Oracle Enterprise Database (12.1.0.2 Solaris SPARC64, standalone - nonrac) Wait Event named "oracle thread bootstrap" belonging to the "Other" Wait Class. 1. what is this wait event? 2. if it's at the top of wait investigation (awr/ash/addm), ho...
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Hi All, I see very high "Class Slave wait" on the Database server. This is top 1 wait on the monitoring ., We use Oracle 12c and ASM ., I could not find lots of details on what it is and causes on why it could be high . ...