Oracle教程 2023-02-24

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

Oracle视图V$NFS_LOCKS是一个动态性能视图，它可以显示NFS共享锁的状态，以及当前持有锁的会话。可以在V$NFS_LOCKS视图中查看或查询NFS服务器上锁的共享活动。

使用Oracle视图V$NFS_LOCKS可以做如下操作：

1. 监控NFS资源：可以使用这个视图来查看当前正在使用NFS资源的会话，以及它们持有的锁的状态。

2. 杀死占用NFS资源的会话：使用这个视图，可以查看NFS上持有的一个或多个锁的信息，找出占用NFS资源的会话，然后杀死占用的会话，以释放锁。

3. 查询当前共享锁：可以使用这个视图来查看当前持有的所有共享锁，以及对资源的访问权限。

V$NFS_LOCKS displays information about byte range locks held on different files by NFS clients.

Column	Datatype	Description
`OPENSTATEID`	`RAW(16)`	Open state ID of the open owner
`OPENSEQUENCEID`	`NUMBER`	Open Sequence ID of the open owner
`LOCKSTATEID`	`RAW(16)`	Lock state ID of the lock owner
`LOCKSEQUENCEID`	`NUMBER`	Lock sequence ID of the lock owner
`LOCKOWNER`	`VARCHAR2(2000)`	Opaque string presented as identification by the lock owner to the NFS server
`OFFSET`	`NUMBER`	Byte Offset from which lock starts
`LENGTH`	`NUMBER`	Length of the lock
`LOCKTYPE`	`VARCHAR2(20)`	Type of the lock
`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

分享到：