V$MYSTAT

This view contains statistics on the current session.

Column	Datatype	Description
SID	NUMBER	ID of the current session
STATISTIC#	NUMBER	Number of the statistic
VALUE	NUMBER	Value of the statistic

v$mystat字面来说就是当前用户的各种统计信息，sid就是session的id(也就是当前用户),STATISTIC#就是统计量的编号(用来唯一确定统计量的名称)，value是统计量的值。

V$STATNAME

This view displays decoded statistic names for the statistics shown in the V$SESSTAT and V$SYSSTAT tables.

On some platforms, the NAME and CLASS columns contain additional operating system-specific statistics.

Column	Datatype	Description
STATISTIC#	NUMBER	Statistic number Note: Statistics numbers are not guaranteed to remain constant from one release to another. Therefore, you should rely on the statistics name rather than its number in your applications.
NAME	VARCHAR2(64)	Statistic name
CLASS	NUMBER	A number representing one or more statistics classes. The following class numbers are additive: 1 - User 2 - Redo 4 - Enqueue 8 - Cache 16 - OS 32 - Real Application Clusters 64 - SQL 128 - Debug
STAT_ID	NUMBER	Identifier of the statistic

v$statname是对统计信息的说明，STATISTIC#相当于编号，NAME就是统计量的名称。

v$statname视图获取系统的统计量的说明
v$mystat视图获取当前用户的在v$statname中的每个统计量的值
两个视图按STATISTIC#连接，可以得到当前用户的sid,统计量的编号,统计量的名称,和统计值.
select b.sid,a.STATISTIC#,a.name,b.value
from v$statname a,v$mystat b
where a.STATISTIC#=b.STATISTIC#;

       SID STATISTIC# NAME                                                                  VALUE
---------- ---------- ---------------------------------------------------------------- ----------
       138          0 logons cumulative                                                         1
       138          1 logons current                                                             1
       138          2 opened cursors cumulative                                           56
       138          3 opened cursors current                                                 1
        ...
       138        314 OTC commit optimization hits                                       0
       138        315 OTC commit optimization failure - setup                       0

ITPub博客

V$MYSTAT and V$STATNAME

V$MYSTAT

V$STATNAME

最新文章