V$CPOOL_STATS

V$CPOOL_STATS displays information about the Database Resident Connection Pool statistics for an instance.

Column	Datatype	Description
POOL_NAME	VARCHAR2(1024)	Name of the Database Resident Connection Pool
NUM_OPEN_SERVERS	NUMBER	Total number of busy and free servers in the pool (including the authentication servers)
NUM_BUSY_SERVERS	NUMBER	Total number of busy servers in the pool (not including the authentication servers)
NUM_AUTH_SERVERS	NUMBER	Number of authentication servers in the pool
NUM_REQUESTS	NUMBER	Number of client requests
NUM_HITS	NUMBER	Total number of times client requests found matching pooled servers in the pool
NUM_MISSES	NUMBER	Total number of times client requests could not find a matching pooled server in the pool
NUM_WAITS	NUMBER	Total number of client requests that had to wait due to non-availability of free pooled servers
WAIT_TIME	NUMBER	Reserved for future use
CLIENT_REQ_TIMEOUTS	NUMBER	Reserved for future use
NUM_AUTHENTICATIONS	NUMBER	Total number of authentications of clients done by the pool
NUM_PURGED	NUMBER	Total number of sessions purged by the pool
HISTORIC_MAX	NUMBER	Maximum size that the pool has ever reached
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

Note: This view returns data only when queried from a CDB root. When queried from a PDB, this view returns 0 rows.