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

Unique snapshot ID

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"