Oracle教程 2023-02-25

Oracle 视图 V$DIAG_INFO 官方解释，作用，如何使用详细说明

V$DIAG_INFO视图是用来查看Oracle数据库的诊断信息，它提供了有关数据库路径、参数、实例信息等。

使用方法：
1、登录SQL Plus，以系统管理员身份进入数据库；
2、执行select * from v$diag_info;命令查看数据库路径、参数、实例信息等。

V$DIAG_INFO describes the state of Automatic Diagnostic Repository (ADR) functionality using NAME=VALUE pairs.

Column	Datatype	Description
`INST_ID`	`NUMBER`	Instance ID
`NAME`	`VARCHAR2(64)`	Identifies a piece of data that reflects the state of ADR, such as whether it is enabled, where the directories and files are located, and how many ongoing issues (incidents and problems) there are. Possible values include: `Diag Enabled`: Indicates whether ADR is enabled or not `ADR Base` through `Health Monitor`: Display different directories (ADR base, ADR home, and then subdirectories within the ADR home) `Default Trace File`: Specifies the current default trace file for the current process `Active Problem Count` and `Active Incident Count`: Specify how many problems/incidents there are in this ADR that either happened in the last 24 hours or have a piece of metadata set indicating that it is a persistent error (like a disk corruption)
`VALUE`	`VARCHAR2(512)`	Describes the current state of the piece of data identified in the `NAME` column
`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

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