There are following main techniques to reduce Lock contention:

1. Reduce the scope of lock.

2. Reduce object pooling.

3. Reduce the number of times a certain lock can be acquired.

4. Avoid synchronization at unnecessary places.

5. Implement hardware supported Optimistic locking in place

of synchronization.

https://www.ibm.com/docs/en/mon-diag-tools?topic=perspective-resolving-lock-contention