Problem solve Get help with specific problems with your technologies, process and projects.

Concurrency in an OLTP environment

Why is concurrency important in an OLTP environment?

Concurrency simply means that many users can access data at the same time. If you didn't have the ability to access data concurrently, then you couldn't really have an OLTP system that would work effectively. For instance, if I accessed the employee table and the database didn't allow concurrent access, then another user would have to wait until I completed using the employee table before they could access it. Not good!

Oracle allows concurrent read access to data without running into locking issues (one user prevents another user from seeing/accessing the same data). In short, Oracle never locks data when you read it. Data is only locked when it is being written. Even during a write, users can still see the data, they just may see a version of the data as it looked prior to an update which may be in process (the term for this is called consistency).

Hope that helps!

For More Information

  • What do you think about this answer? E-mail the editors at editor@searchDatabase.com with your feedback.
  • The Best Oracle Web Links: tips, tutorials, scripts, and more.
  • Have an Oracle or SQL tip to offer your fellow DBAs and developers? The best tips submitted will receive a cool prize. Submit your tip today!
  • Ask your technical Oracle and SQL questions -- or help out your peers by answering them -- in our live discussion forums.
  • Ask the Experts yourself: Our SQL, database design, Oracle, SQL Server, DB2, metadata, object-oriented and data warehousing gurus are waiting to answer your toughest questions.

Dig Deeper on Oracle database design and architecture

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.