DBA_ADDM_INSTANCES provides instance-level information for ADDM tasks that finished executing. For each instance that was supposed to be analyzed (whether it was or not) there is one row describing information about it.

Related View

USER_ADDM_INSTANCES provides instance-level information for ADDM tasks that finished executing in all instances owned by the current user.

Column Datatype NULL Description
TASK_ID NUMBER NOT NULL The ID of the main ADDM task
INSTANCE_NUMBER NUMBER NOT NULL The number of the instance
INSTANCE_NAME VARCHAR2(16)   The name of the instance
HOST_NAME VARCHAR2(64)   The name of the machine on which the instance was running
STATUS VARCHAR2(10)   How information from this instance was used by the ADDM task.

A value of ANALYZED means that the instance participated fully in the analysis. For the following remaining values, the instance was not used during task execution, for the stated reason:

BOUNCED - the instance was shut down or started during the analysis period

NO_SNAPS - there were either begin or end snapshots missing for the instance

NO_STATS - there were key statistics missing for the instance

NOT_FOUND - no mention of this instance could be found in AWR during the analysis period

DATABASE_TIME NUMBER   The database time, in microseconds, accumulated by this instance during the analysis period
ACTIVE_SESSIONS NUMBER   The average number of active sessions for the instance during the analysis period
PERC_ACTIVE_SESS NUMBER   The percentage of active sessions for this instance, out of the total active sessions for the task
LOCAL_TASK_ID NUMBER   The ID of a local ADDM task that contained an analysis of the instance for the same analysis period as that of the main task. If the main task is a local ADDM, then this value is the same as the TASK_ID value.