DBA_HIST_SEG_STAT

DBA_HIST_SEG_STAT displays historical information about segment-level statistics. This view captures the top segments based on a set of criteria and captures information from V$SEGSTAT. The total value is the value of the statistics since instance startup. The delta value is the value of the statistics from the BEGIN_INTERVAL_TIME to the END_INTERVAL_TIME in the DBA_HIST_SNAPSHOT view.

Column	Datatype	NULL	Description
SNAP_ID	NUMBER		Unique snapshot ID
DBID	NUMBER		Database ID for the snapshot
INSTANCE_NUMBER	NUMBER		Instance number for the snapshot
TS#	NUMBER		Tablespace number
OBJ#	NUMBER		Dictionary object number
DATAOBJ#	NUMBER		Data object number
LOGICAL_READS_TOTAL	NUMBER		Cumulative value for logical reads
LOGICAL_READS_DELTA	NUMBER		Delta value for logical reads
BUFFER_BUSY_WAITS_TOTAL	NUMBER		Cumulative value for buffer busy waits
BUFFER_BUSY_WAITS_DELTA	NUMBER		Delta value for buffer busy waits
DB_BLOCK_CHANGES_TOTAL	NUMBER		Cumulative value for db block changes
DB_BLOCK_CHANGES_DELTA	NUMBER		Delta value for db block changes
PHYSICAL_READS_TOTAL	NUMBER		Cumulative value for physical reads
PHYSICAL_READS_DELTA	NUMBER		Delta value for physical reads
PHYSICAL_WRITES_TOTAL	NUMBER		Cumulative value for physical writes
PHYSICAL_WRITES_DELTA	NUMBER		Delta value for physical writes
PHYSICAL_READS_DIRECT_TOTAL	NUMBER		Cumulative value for physical reads direct
PHYSICAL_READS_DIRECT_DELTA	NUMBER		Delta value for physical reads direct
PHYSICAL_WRITES_DIRECT_TOTAL	NUMBER		Cumulative value for physical writes direct
PHYSICAL_WRITES_DIRECT_DELTA	NUMBER		Delta value for physical writes direct
ITL_WAITS_TOTAL	NUMBER		Cumulative value for ITL waits
ITL_WAITS_DELTA	NUMBER		Delta value for ITL waits
ROW_LOCK_WAITS_TOTAL	NUMBER		Cumulative value for row lock waits
ROW_LOCK_WAITS_DELTA	NUMBER		Delta value for row lock waits
GC_CR_BLOCKS_SERVED_TOTAL	NUMBER		Cumulative value for global cache CR blocks served
GC_CR_BLOCKS_SERVED_DELTA	NUMBER		Delta value for global cache CR blocks served
GC_CU_BLOCKS_SERVED_TOTAL	NUMBER		Cumulative value for global cache current blocks served
GC_CU_BLOCKS_SERVED_DELTA	NUMBER		Delta value for global cache current blocks served
GC_BUFFER_BUSY_TOTAL	NUMBER		Cumulative value for global cache buffer busy
GC_BUFFER_BUSY_DELTA	NUMBER		Delta value for global cache buffer busy
GC_CR_BLOCKS_RECEIVED_TOTAL	NUMBER		Cumulative value for global cache CR blocks received
GC_CR_BLOCKS_RECEIVED_DELTA	NUMBER		Delta value for global cache CR blocks received
GC_CU_BLOCKS_RECEIVED_TOTAL	NUMBER		Cumulative value for global cache current blocks received
GC_CU_BLOCKS_RECEIVED_DELTA	NUMBER		Delta value for global cache current blocks received
SPACE_USED_TOTAL	NUMBER		Cumulative value for space used
SPACE_USED_DELTA	NUMBER		Delta value for space used
SPACE_ALLOCATED_TOTAL	NUMBER		Cumulative value for space allocated
SPACE_ALLOCATED_DELTA	NUMBER		Delta value for space allocated
TABLE_SCANS_TOTAL	NUMBER		Cumulative value for table scans
TABLE_SCANS_DELTA	NUMBER		Delta value for table scans