Oracle教程 2023-04-06

Oracle 视图 V$REQDIST 官方解释，作用，如何使用详细说明

本站中文解释

是用来查询系统资源的需求量的Oracle view。它可以帮助数据库管理员对系统资源的使用情况，例如按月或按时精细地查看某一特定的进程或用户请求的数据。

要使用V$REQDIST，首先我们需要采用可以查看数据库活动请求信息的脚本或工具，然后从连接到数据库的会话中查询V$REQDIST视图，这样就可以拿到活动的请求数据信息，包括：用户名，时间，进程编号，请求的类型，CPU和I/O使用，I/O数量等信息。而且，V$REQDIST视图还提供了一种管理及排查系统资源分布的简便途径。

官方英文解释

V$REQDIST lists statistics for the histogram of shared server dispatcher request times, divided into 12 buckets, or ranges of time. The time ranges grow exponentially as a function of the bucket number.

Column Datatype Description

Column	Datatype	Description
`BUCKET`	`NUMBER`	Bucket number: `0 - 11`; the maximum time for each bucket is (`4 * 2^N)/100` seconds
`COUNT`	`NUMBER`	Count of requests whose total time to complete (excluding wait time) falls in this range
`CON_ID`	`NUMBER`	The ID of the container to which the data pertains. 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

BUCKET

NUMBER

Bucket number: 0 - 11; the maximum time for each bucket is (4 * 2^N)/100 seconds

COUNT

NUMBER

Count of requests whose total time to complete (excluding wait time) falls in this range

CON_ID

NUMBER

The ID of the container to which the data pertains. 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 V$REQDIST 官方解释，作用，如何使用详细说明

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