Several times we face deadlocks error sand initially have no clue how to proceed, for that I've created a KBA number #1872040 that talks about such scenarios.
In fact there are two kinds of deadlocks, ORACLE and APPLICATION deadlocks, most of the times the locks are related to application and should be definitely treated by application area specifics. It's very easy to identify if the deadlock is an oracle deadlock or not. See below images that show us the differences.
By exprience I believe that most of the deadlocks are generated by application level, in such cases we will need to consult application team specifics but if the deadlocks are from oracle the solution is still quite simple. By adjusting the INITRANS and MAXTRANS parameter of involved object, mentioned KBA detailed the steps you should take.
Hope you like this blog and any comments/suggestions are welcome!
Best regards,
Jeisson Leonel
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