The number of times that a request to lock an object timed out instead of being granted.
Use this information to help you adjust the setting of the LOCKTIMEOUT database configuration parameter. When the number of lock timeouts becomes excessive compared to normal operating levels, the following conditions might exist:
An application is holding locks for long durations
The LOCKTIMEOUT value needs to be higher
On the other hand, if you have very few lock timeouts, the LOCKTIMEOUT parameter might be set too high. If the LOCKTIMEOUT value is too low, applications can experience high lock wait times.