onstat -g qst command: Print wait options for mutex and condition queues

Use the onstat -g qst command to display the wait statistics for mutex queues and condition queues (queues of waiters for a mutex or a condition).

The QSTATS configuration parameter must be set to 1 to enable the collection of statistics. For more information, see QSTATS configuration parameter.

Figure 1. Syntax:

1  onstat   -g qst

Example output

Figure 2. onstat -g qst command output

Mutex Queue Statistics
name     nwaits   avg_time max_time avgq maxq nservs   avg_time

ddh chai 1        1354863  1354863  1    1    56       1690    

Condition Queue Statistics
name     nwaits   avg_time max_time avgq maxq nservs   avg_time

arrived  1        110008   110008   1    1    0        0
logbf0   21       642      4431     1    2    0        0       
logbf1   15       475      2519     1    2    0        0       
logbf2   19       596      3274     1    2    0        0       
bp_cond  1        0        0        1    1    0        0

Output description

name (string)
Name of the mutex or condition resource being waited for
nwaits (decimal)
Number of times this resource was waited for
avg_time (decimal)
Average time spent waiting (in microseconds)
max_time (decimal)
Maximum time spent waiting (in microseconds)
avgq (decimal)
Average length of the queue
maxq (decimal)
Maximum length of the queue
nservs (decimal)
Number of times this resource was acquired
avg_time (decimal, microsecond)
Average time the resource was held per acquisition (in microseconds)