Partitioning rules can also reduce
contention, but require a clear understanding of your transaction
profile.
The Transaction Name Rule
Find out if transactions have transaction names, and if the contention is caused by transactions with the same name. Try setting the transaction name rule, which forces transactions with the same name to be sent to the replicate one-by-one.
The User Name Rule
Setting the user name rule may help reduce contentions caused by transactions processed in parallel from the same user ID.