This feature is currently undocumented except for the following example.
Example:
mysql> SHOW ENGINE INNODB MUTEX;
+--------+---------------------------+---------------+
| Type | Name | Status |
+--------+---------------------------+---------------+
| InnoDB | &rseg->mutex | os_waits=210 |
| InnoDB | &dict_sys->mutex | os_waits=3 |
| InnoDB | &trx_doublewrite->mutex | os_waits=1 |
| InnoDB | &log_sys->mutex | os_waits=1197 |
| InnoDB | &LRU_list_mutex | os_waits=2 |
| InnoDB | &fil_system->mutex | os_waits=5 |
| InnoDB | &kernel_mutex | os_waits=242 |
| InnoDB | &new_index->lock | os_waits=2 |
| InnoDB | &new_index->lock | os_waits=415 |
.....
For general inquiries, please send us your question and someone will contact you.
