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Oracle® Database Reference
11g Release 2 (11.2)

Part Number E17110-04
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V$CIRCUIT

V$CIRCUIT contains information about virtual circuits, which are user connections to the database through dispatchers and servers.

Column Datatype Description
CIRCUIT RAW(4 | 8) Circuit address
DISPATCHER RAW(4 | 8) Current dispatcher process address
SERVER RAW(4 | 8) Current server process address
WAITER RAW(4 | 8) Address of the server process that is waiting for the (currently busy) circuit to become available
SADDR RAW(4 | 8) Address of the session bound to the circuit
STATUS VARCHAR2(16) Status of the circuit:
  • BREAK - currently interrupted

  • EOF - about to be removed

  • OUTBOUND - an outward link to a remote database

  • NORMAL - normal circuit into the local database

QUEUE VARCHAR2(16) Queue the circuit is currently on:
  • COMMON - on the common queue, waiting to be picked up by a server process

  • DISPATCHER - waiting for the dispatcher

  • SERVER - currently being serviced

  • NONE - idle circuit

MESSAGE0 NUMBER Size in bytes of the messages in the first message buffer
MESSAGE1 NUMBER Size in bytes of the messages in the second message buffer
MESSAGE2 NUMBER Size in bytes of the messages in the third message buffer
MESSAGE3 NUMBER Size in bytes of the messages in the fourth message buffer
MESSAGES NUMBER Total number of messages that have gone through this circuit
BYTES NUMBER Total number of bytes that have gone through this circuit
BREAKS NUMBER Total number of breaks (interruptions) for this circuit
PRESENTATION VARCHAR2(257) Presentation protocol used by the client and server
PCIRCUIT RAW(4 | 8) Address of the parent circuit