5.8 DBA_HIST_MEM_DYNAMIC_COMP

DBA_HIST_MEM_DYNAMIC_COMP displays historical memory component sizes.

This view contains snapshots of V$MEMORY_DYNAMIC_COMPONENTS.

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

COMPONENT

VARCHAR2(64)

NOT NULL

Component name

CURRENT_SIZE

NUMBER

Current size of the component

MIN_SIZE

NUMBER

Minimum size of the component since instance startup

MAX_SIZE

NUMBER

Maximum size of the component since instance startup

USER_SPECIFIED_SIZE

NUMBER

Value of the user parameter for the component

OPER_COUNT

NUMBER

Number of operations since instance startup

LAST_OPER_TYPE

VARCHAR2(13)

Last completed operation for the component:

  • STATIC

  • INITIALIZING

  • DISABLED

  • GROW

  • SHRINK

  • SHRINK_CANCEL

LAST_OPER_MODE

VARCHAR2(9)

Mode of the last completed operation:

  • MANUAL

  • DEFERRED

  • IMMEDIATE

LAST_OPER_TIME

DATE

Start time of the last completed operation

GRANULE_SIZE

NUMBER

Granularity of the GROW or SHRINK operation

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