DBA_HIST_PGASTAT

DBA_HIST_PGASTAT displays historical PGA memory usage statistics as well as statistics about the automatic PGA memory manager when it is enabled.

This view contains snapshots of V$PGASTAT.

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 Database instance number
NAME VARCHAR2(64) NOT NULL

Name of the statistic:

  • aggregate PGA auto target

  • aggregate PGA target parameter

  • bytes processed

  • cache hit percentage

  • extra bytes read/written

  • global memory bound

  • max processes count

  • maximum PGA allocated

  • maximum PGA used for auto workareas

  • maximum PGA used for manual workareas

  • over allocation count

  • PGA memory freed back to OS

  • process count

  • recompute count (total)

  • total freeable PGA memory

  • total PGA allocated

  • total PGA inuse

  • total PGA used for auto workareas

  • total PGA used for manual workareas

See Also: V$PGASTAT for descriptions of the statistics

VALUE NUMBER   Statistic value
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$PGASTAT”