7.217 V$FILESTAT

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.

As of Oracle Database 10g Release 2 (10.2), this view also includes reads done by RMAN processes for backup operations.

Column Datatype Description

FILE#

NUMBER

Number of the file

PHYRDS

NUMBER

Number of physical reads done

PHYWRTS

NUMBER

Number of times DBWR is required to write

PHYBLKRD

NUMBER

Number of physical blocks read

OPTIMIZED_PHYBLKRD

NUMBER

Number of physical reads from Database Smart Flash Cache blocks

PHYBLKWRT

NUMBER

Number of blocks written to disk, which may be the same as PHYWRTS if all writes are single blocks

SINGLEBLKRDS

NUMBER

Number of single block reads

READTIM

NUMBER

Time (in hundredths of a second) spent doing reads if the TIMED_STATISTICS parameter is true; 0 if false

WRITETIM

NUMBER

Time (in hundredths of a second) spent doing writes if the TIMED_STATISTICS parameter is true; 0 if false

SINGLEBLKRDTIM

NUMBER

Cumulative single block read time (in hundredths of a second)

AVGIOTIM

NUMBER

Average time (in hundredths of a second) spent on I/O, if the TIMED_STATISTICS parameter is true; 0 if false

LSTIOTIM

NUMBER

Time (in hundredths of a second) spent doing the last I/O, if the TIMED_STATISTICS parameter is true; 0 if false

MINIOTIM

NUMBER

Minimum time (in hundredths of a second) spent on a single I/O, if the TIMED_STATISTICS parameter is true; 0 if false

MAXIORTM

NUMBER

Maximum time (in hundredths of a second) spent doing a single read, if the TIMED_STATISTICS parameter is true; 0 if false

MAXIOWTM

NUMBER

Maximum time (in hundredths of a second) spent doing a single write, if the TIMED_STATISTICS parameter is true; 0 if false

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