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

本站中文解释

Oracle视图V$IOFUNCMETRIC是一个动态视图,可以用来查询统计当前操作系统性能度量指标,提供了函数文件I/O操作的度量数据,可以显示和求出每一个不同的I/O函数文件的性能指标,如开始到结束的时间,写或读的字节,读或写的次数等。

使用V$IOFUNCMETRIC,你可以查询或统计指定时间段内每一个不同的I/O函数文件的性能指标。SQL语句语法如下:

SELECT * FROM V$IOFUNCMETRIC WHERE START_TIM>=从某时间点开始;

官方英文解释

V$IOFUNCMETRIC displays I/O statistics information by database function for the most recent time interval period.

Column Datatype Description

BEGIN_TIME

DATE

Begin time of the interval

END_TIME

DATE

End time of the interval

INTSIZE_CSEC

NUMBER

Interval size (in hundredths of a second)

FUNCTION_ID

NUMBER

Function ID

FUNCTION_NAME

VARCHAR2(18)

Function name

SMALL_READ_MBPS

NUMBER

Single block megabytes read per second

SMALL_WRITE_MBPS

NUMBER

Single block megabytes written per second

LARGE_READ_MBPS

NUMBER

Multiblock megabytes read per second

LARGE_WRITE_MBPS

NUMBER

Multiblock megabytes written per second

SMALL_READ_IOPS

NUMBER

Single block read requests per second

SMALL_WRITE_IOPS

NUMBER

Single block write requests per second

LARGE_READ_IOPS

NUMBER

Multiblock read requests per second

LARGE_WRITE_IOPS

NUMBER

Multiblock write requests per second

AVG_WAIT_TIME

NUMBER

Average wait time (in milliseconds)

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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数据运维技术 » Oracle 视图 V$IOFUNCMETRIC 官方解释,作用,如何使用详细说明