What is the method that Oracle uses to prevent table locking?

In Oracle, you can prevent table locking by using the following methods:

1. Choose the appropriate transaction isolation level: Setting the right transaction isolation level can prevent unnecessary table locking situations. For example, using the READ COMMITTED isolation level can help avoid unnecessary table locks.
2. Avoid lengthy transactions: Running transactions for extended periods of time can lead to locking tables, so it’s best to avoid creating long transactions whenever possible.
3. Avoid performing a large number of update operations in a transaction: If a transaction includes a large number of update operations, it may cause the table to be locked. Consider dividing the update operations into multiple smaller transactions.
4. Utilize suitable indexes: Appropriate indexes can enhance query performance and reduce the likelihood of table locking.
5. Regularly clearing out useless locks can reduce the occurrence of lock contention.
6. Utilize appropriate concurrency control mechanisms: in high-concurrency environments, consider using concurrency control mechanisms with smaller lock granularity to reduce occurrences of lock contention.