今天通过视频学习，和网上搜索总结了一些oracle 常用的动态性能视图和大家分享

要查看oralce有哪些可用的动态性能视图可以看v$fixed_table

1.关于数据库/实例的动态性能视图

v$database :displays information about the database from the control file.

v$instance :displays the state of the current instance(当前实例的状况)

v$option ：displays oracle database options and features(数据库的选项和特性)

：option must be separately licensed(选项单独认证设置)

：whereas features come with the product and are enabled based on

the product that is running(产品特性的发挥也是要产品运行才能体现)

v$parameter ：displays information about the initialization parameter that

:are currently in effect for the session.A new session inherits

:parameter values from the instance-wide values displayed by the

:v$system_parameter view.

v$backup    :display the backup status of all online datafiles.(所有在线数据文件的备份情况)

v$px_process_sysstat ：contains information about the sessions running parallel execution

(包含并行执行会话的信息)

v$process ：displays information about the currently active processes(活动进程的信息)

v$waitstat: displays block contention statistics.this table is only updated when timed

:statistics are enabled(显示热块竞争的统计，当时间统计参数启动时，这个表只能更新)

v$system_event ：total waits for an event(事件的总等待时间)

2.关于磁盘文件的视图

v$datafile :datafile information from the control file

v$filestat :displays the number of physical reads and writes done and the total number of

:single-block and multiblock I/Os done at file level(在文件级别显示物理读写和io信息)

v$log    ：displays log file information from the control file

v$log_history :log history information from the control file

v$dbfile :all datafiles making up the database

v$tempfile :tempfile information

v$tempstat :file read/write statistics(文件读写的统计)

v$segment_statistics ：segment-level statistics

3.contention竞争的视图

v$lock :lists the locks currently held by the oracle database and outstanding requests for

: a lock or latch (正在使用的锁和过多的请求对锁)

v$rollname ：lists the names of all online rollback segments(在线回滚段的信息)

v$rollstat ：contains rollback segment statistics(回滚段的统计情况)

v$waitstat ：block contention statistics(块争用统计)

v$latch ：aggregate latch statistics (闩锁的总和统计)

4.memory 的视图

v$buffer_pool_statistics :statistics about all buffer pools available for the instance

:(实例所有可用的缓存池的统计)

v$db_object_cache：database objects thatare cached inthe library cache(被缓存在库缓存区的对象)

v$librarycache ：contains statistics about library cache performance and activity

(库缓存区的性能和活动的统计信息)

v$rowcache ：statistics for data dictionary activity(数据字典活动信息统计)

v$sysstat：system statistics

v$sgastat :detailed information on the system global area(sga)

5.用户/会话的视图

v$lock :lists the locks currently held by the oracle database and outstanding requests for

: a lock or latch (正在使用的锁和过多的请求对锁)

v$open_cursor :list cursors that each user session currently has opened and parsed,or cached

(当前会话打开的游标列表)

v$process ：displays information about the currently active processes(活动进程的信息)

v$transaction ：lists the active transaction in the system (列出系统活动的事物)

v$px_sesstat ：parallel execution(px),contains information about the sessions running

(正在执行会话的并行执行情况统计)

v$px_session ：parallel execution(px),contains information about the sessions running

v$sesstat ：user session statistics

v$session_event :on waits for an event by a session(会话等待事件)

v$sort_usage ：在11g好像就没有了

v$sort_segment:displays information about every sort segment in given instance

显示实例中给出的每个回滚段的信息。

v$session_wait ：current or last wait for each session(当前或上次的等待信息)

v$session

v$session_object_cache ：object cache statistics for the current user session on the local

:server(instance)