V$LATCH_MISSES displays statistics about missed attempts to acquire a latch.
| Column | Datatype | Description |
|---|---|---|
PARENT_NAME |
VARCHAR2(64) |
Latch name of a parent latch |
WHERE |
VARCHAR2(80) |
This column is obsolete and maintained for backward compatibility. The value of this column is always equal to the value in LOCATION. |
NWFAIL_COUNT |
NUMBER |
Number of times that no-wait acquisition of the latch failed |
SLEEP_COUNT |
NUMBER |
Number of times that acquisition attempts caused sleeps |
WTR_SLP_COUNT |
NUMBER |
Number of times a waiter slept |
LONGHOLD_COUNT |
NUMBER |
Number of times someone held a latch for the entire duration of someone else's sleep |
LOCATION |
VARCHAR2(80) |
Location that attempted to acquire the latch |