onstat -g lmx command: Print all locked mutexes

Use the onstat -g lmx command to display information about all locked mutexes.


Syntax:

>>-onstat-- -g--lmx--------------------------------------------><

Example output

Figure 1. onstat -g lmx command output

Locked mutexes:
mid      addr             name               holder   lkcnt  waiter   waittime
119006   7000001e684b928  td_mutex           298      0     
134825   7000002043a9148  free_lock          11009    0      200      22921   
                                                             11010    22918   
587817   70000022ddb3268  sync_lock1         200      0     
593614   700000239ce7b68  SB_LTH_LATCH       875      0 

Number of mutexes on VP free lists: 49

Output description

mid: Internal mutex identifier
addr: Address of locked mutex
name: Name of the mutex
holder: Thread ID of the thread that is holding the mutex; 0 = The read/write mutex is held in shared mode
lkcnt: For a read/write mutex, the current number of threads that are locking the mutex in shared mode. For a relockable mutex, the number of times the mutex was locked or relocked by the thread that is holding the mutex.
waiter: List of IDs of the threads that are waiting for this mutex
waittime: Amount of time in seconds that the thread is waiting