1. Database Reference
  2. Dynamic Performance Views
  3. Dynamic Performance (V$) Views: V$ACCESS to V$HVMASTER_INFO
  4. V$FLASHFILESTAT

7.228 V$FLASHFILESTAT

V$FLASHFILESTAT displays statistics about Database Smart Flash Cache.

By taking snapshots of SINGLEBLKRDS and SINGLEBLKRDTIM_MICRO, you can easily calculate the average latency of all the flash files in a given time period

Column Datatype Description

FLASHFILE#

NUMBER

The file number of the flash file

NAME

VARCHAR2(513)

Name and path of the flash file

BYTES

NUMBER

Size of the flash file, in bytes

ENABLED

NUMBER

Indicates whether this flash file is enabled or not

SINGLEBLKRDS

NUMBER

Number of reads to the flash file

SINGLEBLKRDTIM_MICRO

NUMBER

Cumulative latency of reading blocks from this particular flash file/device, in microseconds

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

See Also:

Oracle Database Administrator’s Guide for more information about configuring Database Smart Flash Cache