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V$SESSION_LONGOPS displays the status of various operations that run for longer than 6 seconds (in
absolute time). These operations currently include many backup and recovery functions, statistics gathering, and query execution, and more operations are added for every Oracle release.
这个视图显示了运行时间超过6秒的一些操作的状态（绝对时间）。这些操作目前包括许多备份和恢复功能，统计信息收集，以及查询执行，以及更多的被加入到数据库版本中的操作。
To monitor query execution progress, you must be using the cost-based optimizer and you must:
为了监视查询执行的进度，你必须使用基于代价的优化器并且你必须：
Set the TIMED_STATISTICS or SQL_TRACE parameters
to true
设置参数TIMED_STATISTICS 或 SQL_TRACE为TRUE
Gather statistics for your objects with the DBMS_STATS package
用DBMS_STATS包为你的对象收集统计信息
You can add information to this view about application-specific long-running operations by using theDBMS_APPLICATION_INFO.SET_SESSION_LONGOPS procedure.
你可以通过使用过程DBMS_APPLICATION_INFO.SET_SESSION_LONGOPS将一些应用指定的长时间运行操作信息添加到这个视图。
| Column | Datatype | Description |
|---|---|---|
SID |
NUMBER |
Identifier of the session processing the long-running operation. If multiple sessions are cooperating in the long-running operation, then SID corresponds
to the main or master session.Session标识 |
SERIAL# |
NUMBER |
Serial number of the session processing the long-running operation. If multiple sessions are cooperating in the long-running operation, then SERIAL# corresponds
to the main or master session. SERIAL# is used to uniquely identify a session‘s objects. Guarantees
that session-level commands are applied to the correct session objects if the session ends and another session begins with the same session ID.Session串号 |
OPNAME |
VARCHAR2(64) |
Brief description of the operation 操作简要说明 |
TARGET |
VARCHAR2(64) |
Object on which the operation is carried out 操作运行所在的对象 |
TARGET_DESC |
VARCHAR2(32) |
Description of the target 目标对象说明 |
SOFAR |
NUMBER |
Units of work done so far for the operation specified in the OPNAME column在PNAME列指定的操作至今为止完成的工作量 |
TOTALWORK |
NUMBER |
Total units of work for the operation specified in the OPNAME column总工作量 |
UNITS |
VARCHAR2(32) |
Units of measurement 工作量单位 |
START_TIME |
DATE |
Starting time of the operation 操作开始时间 |
LAST_UPDATE_TIME |
DATE |
Time when statistics were last updated for the operation 统计项最后更新时间 |
TIMESTAMP |
DATE |
Timestamp specific to the operation |
TIME_REMAINING |
NUMBER |
Estimate (in seconds) of time remaining for the operation to complete 预计完成操作的剩余时间(秒) |
ELAPSED_SECONDS |
NUMBER |
Number of elapsed seconds from the start of the operations 从操作开始总花费时间(秒) |
CONTEXT |
NUMBER |
Context 前后关系 |
MESSAGE |
VARCHAR2(512) |
Statistics summary message 统计项的完整描述 |
USERNAME |
VARCHAR2(30) |
User ID of the user performing the operation 执行操作的用户ID |
SQL_ADDRESS |
RAW(4 | 8) |
Used with the value of the SQL_HASH_VALUEcolumn to identify the SQL statement associated with the
operation用于连接查询的列 |
SQL_HASH_VALUE |
NUMBER |
Used with the value of the SQL_ADDRESScolumn to identify the SQL statement associated with the operation |
SQL_ID |
VARCHAR2(13) |
SQL identifier of the SQL statement associated with the long operation, if any |
SQL_PLAN_HASH_VALUE |
NUMBER |
SQL plan hash value; NULL if SQL_ID is NULL |
SQL_EXEC_START |
DATE |
Time when the execution of the SQL started; NULL if SQL_ID is NULL |
SQL_EXEC_ID |
NUMBER |
SQL execution identifier (seeV$SQL_MONITOR) |
SQL_PLAN_LINE_ID |
NUMBER |
SQL plan line ID corresponding to the long operation; NULL if the long operation is not associated with a line of the execution plan |
SQL_PLAN_OPERATION |
VARCHAR2(30) |
Plan operation name; NULL ifSQL_PLAN_LINE_ID is NULL |
SQL_PLAN_OPTIONS |
VARCHAR2(30) |
Plan operation options; NULL ifSQL_PLAN_LINE_ID is NULL |
QCSID |
NUMBER |
Session identifier of the parallel coordinator |
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原文地址：http://blog.csdn.net/jiaping0424/article/details/51340040
