Oracle教程 2023-02-24

Oracle 视图 DBA_HIST_SESS_TIME_STATS 官方解释，作用，如何使用详细说明

本站中文解释

Oracle视图DBA_HIST_SESS_TIME_STATS用于显示会话操作消耗的时间统计信息，对数据库中每次会话执行记录中每个步骤执行消耗时间的累计信息，可以统计出某次会话执行每步骤耗时。

使用方法

1、在Oracle数据库控制台中，使用以下SQL语句查看当前会话操作耗时：

SELECT SQL_ID,SESSION_ID,SESSION_SERIAL#,EVENT,TIME_WAITED
FROM DBA_HIST_SESS_TIME_STATS
WHERE TIME_WAITED > 0
2、使用以下SQL语句可以查看一段时间内某个会话的操作耗时：
SELECT SQL_ID,SESSION_ID,SESSION_SERIAL#,EVENT,TIME_WAITED,SAMPLE_TIME
FROM DBA_HIST_SESS_TIME_STATS
WHERE SESSION_ID= AND SAMPLE_TIME > to_date(‘20200101′,’yyyymmdd’);

官方英文解释

DBA_HIST_SESS_TIME_STATS displays information about CPU and I/O time for interesting Oracle GoldenGate and XStream sessions.

Column	Datatype	NULL	Description
`SNAP_ID`	`NUMBER`	`NOT NULL`	Unique snapshot ID
`DBID`	`NUMBER`	`NOT NULL`	Database ID for the snapshot
`INSTANCE_NUMBER`	`NUMBER`	`NOT NULL`	Instance number for the snapshot
`SESSION_TYPE`	`VARCHAR2(64)`	`NOT NULL`	Type of session
`MIN_LOGON_TIME`	`DATE`		Minimum logon time
`SUM_CPU_TIME`	`NUMBER`		Total CPU time
`SUM_SYS_IO_WAIT`	`NUMBER`		Total system I/O wait time
`SUM_USER_IO_WAIT`	`NUMBER`		Total user I/O wait time
`CON_DBID`	`NUMBER`		The database ID of the PDB for the sampled session
`SESSION_MODULE`	`VARCHAR2(64)`	`NOT NULL`	Session module. Valid values: XStream GoldenGate
`CON_ID`	`NUMBER`		The ID of the container that `CON_DBID` identifies. Possible values include: `0`: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs. `1`: This value is used for rows containing data that pertain to only the root n: Where n is the applicable container ID for the rows containing data

数据运维技术 » Oracle 视图 DBA_HIST_SESS_TIME_STATS 官方解释，作用，如何使用详细说明

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