Oracle 视图 V$SESSION_EVENT 官方解释，作用，如何使用详细说明
本站中文解释
也叫V$SYSTEM_EVENT视图，用于显示会话等待事件的信息，其中 V$SESSION_EVENT.EVENT即做为事件名称，有些事件是比较常被其他程序使用，比如SQL*Net message from client，Oracle系统自执行的sql会有不同的等待事件，比如
library cache pin、direct path read/write 等。可以用如下查询来查看有关的会话的等待事件情况：
SELECT s.sid,
s.serial#,
se.event,
se.seconds_in_wait,
se.state
FROM v$session s,
v$session_event se
WHERE s.sid = se.sid
AND s.serial# = se.serial#;
官方英文解释
V$SESSION_EVENT displays information on waits for an event by a session. Note that the TIME_WAITED and AVERAGE_WAIT columns will contain a value of zero on those platforms that do not support a fast timing mechanism. If you are running on one of these platforms and you want this column to reflect true wait times, then you must set TIMED_STATISTICS to true in the parameter file; doing this will have a small negative effect on system performance.
See Also:
“TIMED_STATISTICS”
| Column | Datatype | Description |
|---|---|---|
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Session identifier |
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Name of the wait event; derived statistic name from See Also: “Oracle Wait Events” |
|
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|
Total number of waits for the event by the session |
|
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|
Total number of timeouts for the event by the session |
|
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|
Total amount of time waited for the event by the session (in hundredths of a second) |
|
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|
Average amount of time waited for the event by the session (in hundredths of a second) |
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Maximum amount of time waited for the event by the session (in hundredths of a second) |
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|
Total amount of time waited for the event by the session (in microseconds) |
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Total amount of CPU time consumed by the session while implementing the wait event itself (in microseconds) |
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|
Identifier of the wait event |
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Identifier of the wait class of the wait event |
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|
Number of the wait class of the wait event |
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|
Name of the wait class of the wait event |
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The ID of the container to which the data pertains. Possible values include:
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