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

How can I identify data files with active Oracle I/O?

Can you find the data files with active Oracle I/O without affecting the application? Oracle expert Brian Peasland answers this question and offers solutions in this tip.

I need to move data files from one mount point to another as part of space management.

If I make the tablespaces that are currently involved in any read/write operation of data files offline, application jobs will fail.

How do I identify the Oracle data files that are part of any read/write operation in the database currently?

You cannot see which data files have active I/O, at least not by querying the database. You can use OS utilities to see Oracle I/O usage on a file. However, even armed with this information, the moment you receive the information, you are out of date. I/O on a file can change in millisecond. One moment, there is no I/O on a file and the next moment, there is I/O on that file. The only way to ensure the files have no I/O is to 1) shutdown the database or 2) take the tablespace offline. You will need to arrange some downtime as your application will be affected. 

This was last published in December 2010

Dig Deeper on Oracle database backup and recovery

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.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

SearchDataManagement

SearchBusinessAnalytics

SearchSAP

SearchSQLServer

TheServerSide

SearchDataCenter

SearchContentManagement

SearchFinancialApplications

Close