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

本站中文解释

Oracle 视图 V$LOCK_TYPE 是一个系统级的数据字典视图，记录了系统中可能出现的所有锁类型。它用于查询Oracle数据库内部锁定的类型，并为用户提供和分析正在运行的一些操作的更多信息。V$LOCK_TYPE 视图提供的关于系统锁的信息可以帮助用户了解当前系统中发生的锁定状况，从而加以分析和调整系统便能更好地被控制。

使用 Oracle 视图 V$LOCK_TYPE 时，用户只需通过执行一条简单的查询语句，即可得到所有当前系统中可能出现的锁类型信息：

SELECT * FROM V$LOCK_TYPE;

官方英文解释

V$LOCK_TYPE describes the type of locks available.

Column Datatype Description

TYPE

VARCHAR2(64)

A two-letter internal resource identifier

NAME

VARCHAR2(64)

Resource type name. This is a short (less than 32 characters) enqueue type name.

ID1_TAG

VARCHAR2(64)

Description of the enqueue type.

ID2_TAG

VARCHAR2(64)

Further description of the enqueue type.

IS_USER

VARCHAR2(3)

User enqueue. These are enqueues that are acquired as a direct result of a SQL statement. Applications may get deadlocks on these enqueues. Such deadlocks are considered application errors.

IS_RECYCLE

VARCHAR2(3)

Indicates whether the enqueue requires caching of the associated resource in the DLM’s resource cache.

Possible values:

  • NO: Means the enqueue requires caching of the associated resource in the DLM’s resource cache

  • YES: Means the enqueue does not require caching of the associated resource in the DLM’s resource cache

DESCRIPTION

VARCHAR2(4000)

Explanation of how or for what purpose the enqueue is used.

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$LOCK_TYPE 官方解释，作用，如何使用详细说明
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