7.170 V$DEAD_CLEANUP

V$DEAD_CLEANUP shows the dead processes and killed sessions present in the instance and their cleanup status.

Column Datatype Description

TYPE

VARCHAR2(64)

Indicates whether a row contains a DEAD PROCESS or KILLED SESSION

PADDR

RAW(8)

Process pointer. Can be joined with V$PROCESS. For a killed session, this is the owner of the session, which can be NULL.

SADDR

RAW(8)

Session pointer. Can be joined with V$SESSION. For a dead process, this is the user session.

ROOT_ADDR

RAW(8)

Pointer to the root of the tree

CLEANUP_OWNER

VARCHAR2(64)

Indicates which process is responsible for cleanup of this tree:

  • CLEANUP PROCESS - a cleanup process is responsible

  • OWNER PROCESS - the root owner is responsible

STATE

VARCHAR2(64)

Cleanup state:

  • CLEANUP PENDING - Occurs for a dead process / killed session that can be cleaned up, but PMON has not yet made an attempt

  • IN PROGRESS - A cleanup attempt is currently in progress

  • RESOURCES FREED - Occurs for a dead process / killed session where all children have been freed, but the process / killed session itself is not yet freed

  • PARTIAL CLEANUP - Occurs if some of the children have been cleaned up

DEAD_TIME

NUMBER

Time since the process was marked dead or the session was marked killed (in seconds)

CLEANUP_ATTEMPTS

NUMBER

Number of times PMON has attempted cleanup

LAST_ATTEMPT

NUMBER

How long ago the last cleanup attempt occurred (in seconds)

CLEANUP_PROCESS

RAW(8)

Process pointer for the cleanup process currently cleaning up this tree (can join with V$CLEANUP_PROCESS). It will be NULL if cleanup is not currently in progress or if the owner is responsible for cleanup.

CLEANUP_TIME

NUMBER

Total amount of time PMON has spent on cleanup of the process/session (in seconds)

NUM_BLOCKED

NUMBER

Number of sessions blocked on cleanup of this session

CON_ID

NUMBER

The ID of the container to which the data pertains. 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$CLEANUP_PROCESS"