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 
TARGET_INSTANCE 
NUMBER 
NOT NULL 
Target instance number 
CNT_500B 
NUMBER 

Number of pings of size 500 bytes from INSTANCE_NUMBER to TARGET_INSTANCE since the startup of the source instance (INSTANCE_NUMBER ) 
WAIT_500B 
NUMBER 

Sum of roundtrip times for messages of size 500 bytes from INSTANCE_NUMBER to TARGET_INSTANCE since the startup of the source instance (INSTANCE_NUMBER ). Dividing by CNT_500B gives the average latency. 
WAITSQ_500B 
NUMBER 

Sum of squares (divided by 1000) of roundtrip times for messages of size 500 bytes from INSTANCE_NUMBER to TARGET_INSTANCE since the startup of the source instance (INSTANCE_NUMBER ). When used with CNT_500B and WAIT_500B , the standard deviation of the latency can be calculated. 
CNT_8K 
NUMBER 

Number of pings of size 8 KB from INSTANCE_NUMBER to TARGET_INSTANCE since the startup of the source instance (INSTANCE_NUMBER ) 
WAIT_8K 
NUMBER 

Sum of roundtrip times for messages of size 8 KB from INSTANCE_NUMBER to TARGET_INSTANCE since the startup of the source instance (INSTANCE_NUMBER ). Dividing by CNT_8K gives the average latency. 
WAITSQ_8K 
NUMBER 

Sum of squares (divided by 1000) of roundtrip times for messages of size 8 KB from INSTANCE_NUMBER to TARGET_INSTANCE since the startup of the source instance (INSTANCE_NUMBER ). When used with CNT_8K and WAIT_8K , the standard deviation of the latency can be calculated. 
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 nonCDBs.

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
