V$PX_SESSION contains information about the sessions running parallel execution.
| Column | Datatype | Description |
|---|---|---|
SADDR |
RAW(4 | 8) |
Session address |
SID |
NUMBER |
Session identifier |
SERIAL# |
NUMBER |
Session serial number |
QCSID |
NUMBER |
Session identifier of the parallel coordinator |
QCSERIAL# |
NUMBER |
Session serial number of the parallel coordinator |
QCINST_ID |
NUMBER |
Instance number on which the parallel coordinator is running |
SERVER_GROUP |
NUMBER |
The logical group of servers to which this cluster database process belongs |
SERVER_SET |
NUMBER |
The logical set of servers to which this cluster database process belongs. A single server group will have at most two server sets. |
SERVER# |
NUMBER |
The logical number of the cluster database process within a server set |
DEGREE |
NUMBER |
The degree of parallelism being used by the server set |
REQ_DEGREE |
NUMBER |
The degree of parallelism that was requested by the user when the statement was issued and prior to any resource, multi-user, or load balancing reductions |