What are the reasons for frequent locking of Oracle users?

Here are some possible reasons why Oracle users are frequently getting locked out:

1. Multiple incorrect password entries: When a user enters the wrong password multiple times, Oracle will automatically lock the user account to protect system security.
2. Concurrent user operations: If one user is attempting to access a long-running operation while another user is trying to access it, Oracle may lock that user to prevent conflicts.
3. Exceeding the maximum connection limit: If a user attempts to connect to the Oracle database in a number that exceeds the maximum connection limit set for the database, the user may be locked out.
4. Permission issues: Oracle may lock a user if they try to access an object they don’t have permission for or perform an operation they don’t have permission for.
5. Resource competition: If multiple users attempt to access the same resource, such as a table or index, simultaneously, it can result in users being locked out.
6. Locking a table or row: If a user tries to modify a table or row that has already been locked by another user, Oracle may lock that user as well.
7. Database performance issues, such as prolonged queries or deadlocks, can potentially result in users being locked out.