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Oracle® Database Reference
11g Release 2 (11.2)

E40402-14
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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 NOT NULL Unique snapshot ID
DBID NUMBER NOT NULL Database ID for the snapshot
INSTANCE_NUMBER NUMBER NOT NULL Instance number for the snapshot
TS# NUMBER NOT NULL Tablespace number
OBJ# NUMBER NOT NULL Dictionary object number
DATAOBJ# NUMBER NOT NULL 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
CHAIN_ROW_EXCESS_TOTAL NUMBER   Cumulative value of number of chained row pieces that can be eliminated by table reorganization
CHAIN_ROW_EXCESS_DELTA NUMBER   Delta value of number of chained row pieces that can be eliminated by table reorganization
PHYSICAL_READ_REQUESTS_TOTAL NUMBER   Cumulative value of number of physical read I/O requests issued for the monitored segment
PHYSICAL_READ_REQUESTS_DELTA NUMBER   Delta value of number of physical read I/O requests issued for the monitored segment
PHYSICAL_WRITE_REQUESTS_TOTAL NUMBER   Cumulative value of number of physical write I/O requests issued for the monitored segment
PHYSICAL_WRITE_REQUESTS_DELTA NUMBER   Delta value of number of physical write I/O requests issued for the monitored segment
OPTIMIZED_PHYSICAL_READS_TOTAL NUMBER   Cumulative value of number of physical reads from Database Smart Flash Cache for the monitored segment
OPTIMIZED_PHYSICAL_READS_DELTA NUMBER   Delta value of number of physical reads from Database Smart Flash Cache for the monitored segment