A session waits on this event when it wants to update a shared mutex pin and another session is currently in the process of updating a shared mutex pin for the same cursor object. This wait event should rarely be seen because a shared mutex pin update is very fast.
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 