SNAP_ID | 
NUMBER | 
NOT NULL | 
Unique snapshot ID | 
DBID | 
NUMBER | 
NOT NULL | 
Database ID for the snapshot | 
INSTANCE_NUMBER | 
NUMBER | 
NOT NULL | 
Instance number for the snapshot | 
FILE# | 
NUMBER | 
NOT NULL | 
File identification number | 
CREATION_CHANGE# | 
NUMBER | 
NOT NULL | 
Change number at which the tempfile was created | 
FILENAME | 
VARCHAR2(513) | 
NOT NULL | 
Name of the tempfile | 
TS# | 
NUMBER | 
NOT NULL | 
Tablespace number | 
TSNAME | 
VARCHAR2(30) | 
NOT NULL | 
Name of the tablespace | 
BLOCK_SIZE | 
NUMBER | 
  | 
Block size of the tempfile | 
PHYRDS | 
NUMBER | 
  | 
Number of physical reads done | 
PHYWRTS | 
NUMBER | 
  | 
Number of times DBWR is required to write | 
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) | 
PHYBLKRD | 
NUMBER | 
  | 
Number of physical blocks read | 
PHYBLKWRT | 
NUMBER | 
  | 
Number of blocks written to disk, which may be the same as PHYWRTS if all writes are single blocks | 
WAIT_COUNT | 
NUMBER | 
  | 
Wait Count | 
TIME | 
NUMBER | 
  | 
Wait time |