How to Rectify Oracle Deadlock | Oracle Deadlock Rectification with a Quick solution

Each user session might have one or more tasks running on its behalf where each task might acquire or wait to acquire a variety of resources. The following types of resources can cause blocking that could result in a deadlock.

Causes to Deadlock

LocksWorker threadsMemoryParallel query execution-related resourcesMultiple Active Result Sets (MARS) resources
All the above listed may cause to Deadlock.
The default interval is 5 seconds.
If the lock monitor thread finds deadlocks the deadlock detection interval will drop from 5 seconds to as low as 100 milliseconds depending on the frequency of deadlocks.
If the lock monitor thread stops finding deadlocks the Database Engine increases the intervals between searches to 5 seconds.
You can find some more information regarding Deadlock

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