Users get the following error: ora-00055 maximum number of dml locks exceeded? What is the problem and how do you fix it?
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Answer / Rajeev Srivastava
The ORA-00055: maximum number of DML locks exceeded error occurs when a user tries to acquire more Data Manipulation Language (DML) locks than allowed by the database. This issue can be caused by concurrent DML operations on the same data block, or by long transactions that hold locks for an extended period.
To fix this issue, you can:
1. Optimize queries to reduce the lock duration.
2. Use transaction isolation levels that require fewer locks (e.g., READ COMMITTED instead of SERIALIZABLE).
3. Increase the maximum number of DML locks allowed by modifying the OPEN_CURSORS parameter.
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