A session waits for this event when it is requesting a shared mutex pin and another session is holding an exclusive mutex pin on the same cursor object.
Wait Time: Microseconds
| Parameter | Description |
|---|---|
| P1 | Hash value of cursor |
| P2 | Mutex value (top 2 bytes contains SID holding mutex in exclusive mode, and bottom two bytes usually hold the value 0) |
| P3 | Mutex where (an internal code locator) OR’d with Mutex Sleeps |
Oracle Database Internal Mechanism 