DBA_HIST_BUFFER_POOL_STAT

DBA_HIST_BUFFER_POOL_STAT displays historical statistics about all buffer pools available for the instance.

This view contains snapshots of V$BUFFER_POOL_STATISTICS.

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
ID	NUMBER	NOT NULL	Buffer pool identifier number
NAME	VARCHAR2(20)		Name of the buffer pool
BLOCK_SIZE	NUMBER		Block Size
SET_MSIZE	NUMBER		Buffer pool maximum set size
CNUM_REPL	NUMBER		Number of buffers on the replacement list
CNUM_WRITE	NUMBER		Number of buffers on the write list
CNUM_SET	NUMBER		Number of buffers in the set
BUF_GOT	NUMBER		Number of buffers gotten by the set
SUM_WRITE	NUMBER		Number of buffers written by the set
SUM_SCAN	NUMBER		Number of buffers scanned in the set
FREE_BUFFER_WAIT	NUMBER		Free buffer wait statistic
WRITE_COMPLETE_WAIT	NUMBER		Write complete wait statistic
BUFFER_BUSY_WAIT	NUMBER		Buffer busy wait statistic
FREE_BUFFER_INSPECTED	NUMBER		Free buffer inspected statistic
DIRTY_BUFFERS_INSPECTED	NUMBER		Dirty buffers inspected statistic
DB_BLOCK_CHANGE	NUMBER		Database blocks changed statistic
DB_BLOCK_GETS	NUMBER		Database blocks gotten statistic
CONSISTENT_GETS	NUMBER		Consistent gets statistic
PHYSICAL_READS	NUMBER		Physical reads statistic
PHYSICAL_WRITES	NUMBER		Physical writes statistic
CON_DBID	NUMBER		The database ID of the PDB for the sampled session
CON_ID	NUMBER		The ID of the container that CON_DBID identifies. Possible values include: 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs. 1: This value is used for rows containing data that pertain to only the root n: Where n is the applicable container ID for the rows containing data

See Also: “V$BUFFER_POOL_STATISTICS”