| Oracle® Database Reference 11g Release 1 (11.1) Part Number B28320-01  | 
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V$MUTEX_SLEEP shows the wait time, and the number of sleeps for each combination of mutex type and location.
| Column | Datatype | Description | 
|---|---|---|
MUTEX_TYPE | 
VARCHAR2(32) | 
Type of action/object the mutex protects | 
LOCATION | 
VARCHAR2(40) | 
The code location where the waiter slept for the mutex | 
SLEEPS | 
NUMBER | 
Number of sleeps for this MUTEX_TYPE and LOCATION | 
WAIT_TIME | 
NUMBER | 
Wait time in microseconds |