V$FILEMETRIC_HISTORY definition in Oracle Database 11.2
V$FILEMETRIC_HISTORY
SELECT
begin_time, -- BEGIN_TIME DATE
end_time, -- END_TIME DATE
intsize_csec, -- INTSIZE_CSEC NUMBER
file_id, -- FILE_ID NUMBER
creation_time, -- CREATION_TIME NUMBER
average_read_time, -- AVERAGE_READ_TIME NUMBER
average_write_time, -- AVERAGE_WRITE_TIME NUMBER
physical_reads, -- PHYSICAL_READS NUMBER
physical_writes, -- PHYSICAL_WRITES NUMBER
physical_block_reads, -- PHYSICAL_BLOCK_READS NUMBER
physical_block_writes -- PHYSICAL_BLOCK_WRITES NUMBER
FROM
gv$filemetric_history
WHERE
inst_id = USERENV('INSTANCE')