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Oracle® Database Reference
12c Release 1 (12.1)

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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