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Oracle® Database Reference
11g Release 2 (11.2)

E40402-14
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DBA_HIST_EVENT_HISTOGRAM

DBA_HIST_EVENT_HISTOGRAM displays event histogram historical statistics information. This view contains snapshots of V$EVENT_HISTOGRAM.

Column Datatype NULL Description
SNAP_ID NUMBER NOT NULL Unique snapshot ID
DBID NUMBER NOT NULL Database ID for the snapshot
INSTANCE_NUMBER NUMBER NOT NULL Instance number for the snapshot
EVENT_ID NUMBER NOT NULL Identifier of the wait event
EVENT_NAME VARCHAR2(64) NOT NULL Name of the wait event
WAIT_CLASS_ID NUMBER   Identifier of the class of the wait event
WAIT_CLASS VARCHAR2(64)   Name of the class of the wait event
WAIT_TIME_MILLI NUMBER NOT NULL Wait time (in milliseconds)
WAIT_COUNT NUMBER   Wait count