DBA_HIST_ENQUEUE_STAT displays historical statistics on the number of enqueue (lock) requests for each type of lock. This view contains snapshots of V$ENQUEUE_STATISTICS.
| 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 |
EQ_TYPE |
VARCHAR2(2) |
NOT NULL |
Type of enqueue requested |
REQ_REASON |
VARCHAR2(64) |
NOT NULL |
Reason for the request |
TOTAL_REQ# |
NUMBER |
Total number of enqueue requests or enqueue conversions for the type of enqueue | |
TOTAL_WAIT# |
NUMBER |
Total number of times an enqueue request or conversion resulted in a wait | |
SUCC_REQ# |
NUMBER |
Number of times an enqueue request or conversion was granted | |
FAILED_REQ# |
NUMBER |
Number of times an enqueue request or conversion failed | |
CUM_WAIT_TIME |
NUMBER |
Total amount of time (in milliseconds) spent waiting for the enqueue or enqueue conversion | |
EVENT# |
NUMBER |
Event number |