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

PARENT_NAME

VARCHAR2(50)

NOT NULL

Latch name of a parent latch

WHERE_IN_CODE

VARCHAR2(64)

NOT NULL

Location that attempted to acquire the latch

NWFAIL_COUNT

NUMBER

Number of times that no-wait acquisition of the latch failed

SLEEP_COUNT

NUMBER

Number of times that acquisition attempts caused sleeps

WTR_SLP_COUNT

NUMBER

Number of times a waiter slept

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