FILE#

NUMBER

Datafile identifier number (to find the filename, query DBA_DATA_FILES or V$DBFILE)

BLOCK#

NUMBER

Block number

CLASS#

NUMBER

Class number

STATUS

VARCHAR2(4)

Status of block:

• FREE - not currently in use
• XCUR - exclusive
• SCUR - shared current
• CR - consistent read
• READ - being read from disk
• MREC - in media recovery mode
• IREC - in instance recovery mode

XNC

NUMBER

Number of PCM lock conversions due to contention with another instance. This column is obsolete but is retained for historical compatibility.

FORCED_READS

NUMBER

Number of times the block had to be reread from disk because another instance had forced it out of this instance's cache by requesting the PCM lock on the block in exclusive mode

FORCED_WRITES

NUMBER

Number of times DBWR had to write this block to disk because this instance had used the block and another instance had requested the lock on the block in a conflicting mode

NAME

VARCHAR2(30)

Name of the database object containing the block

PARTITION_NAME

VARCHAR2(30)

NULL for non-partitioned objects

KIND

VARCHAR2(15)

Type of database object

See Also: Table 3-1

OWNER#

NUMBER

Owner number

GC_ELEMENT_ADDR

RAW(4 | 8)

Address of the lock element that contains the PCM lock that is covering the buffer. If more than one buffer has the same address, then these buffers are covered by the same PCM lock.

GC_ELEMENT_NAME

NUMBER

The name of the lock that contains the PCM lock that is covering the buffer