8.146 V$QMON_COORDINATOR_STATS

V$QMON_COORDINATOR_STATS displays statistics of the non-sharded queue master process. There is one row per instance. The rows are deleted when the database (or instance in an Oracle RAC environment) restarts.
Column Datatype Description

QMNC_PID

VARCHAR2(24)

Non-sharded queue master process ID

STATUS

VARCHAR2(24)

Current status of the coordinator:

  • DEAD

  • INITIALIZING

  • RUNNING TASK COORDINATOR

  • WAITING

  • ADDING SERVER

NUM_SERVERS

NUMBER

Number of QMON servers currently running

LAST_SERVER_START_TIME

TIMESTAMP(3) WITH TIME ZONE

Last server startup time

LAST_SERVER_PID

VARCHAR2(24)

Process ID of the last server process (Qnnn) created

NEXT_WAKEUP_TIME

TIMESTAMP(3) WITH TIME ZONE

Next wakeup time of the coordinator

NEXT_READY_TIME

TIMESTAMP(3) WITH TIME ZONE

Ready time of the first delayed task

NEXT_EXPIRY_TIME

TIMESTAMP(3) WITH TIME ZONE

Expiry time of the next ready task

LAST_WAIT_TIME

TIMESTAMP(3) WITH TIME ZONE

Time when the coordinator went to sleep

LAST_FAILURE

VARCHAR2(32)

Last failure encountered

LAST_FAILURE_TIME

TIMESTAMP(3) WITH TIME ZONE

Last failure time

MAX_TASK_LATENCY

VARCHAR2(40)

Maximum task latency across all the servers (in seconds)

MIN_TASK_LATENCY

VARCHAR2(40)

Minimum task latency across all the servers (in seconds)

TOTAL_TASK_LATENCY

NUMBER

Cumulative latency across all the tasks (in seconds)

TOTAL_TASKS_EXECUTED

NUMBER

Cumulative number of tasks serviced by all the servers

MAX_SERVERS

NUMBER

Maximum number of servers present at any point of time

CON_ID

NUMBER

The ID of the container to which the data pertains. The CON_ID value in this view is always 0. The rows pertain to the entire CDB or to the non-CDB.