Skip to Main Content

Oracle Database Discussions

Announcement

For appeals, questions and feedback about Oracle Forums, please email oracle-forums-moderators_us@oracle.com. Technical questions should be asked in the appropriate category. Thank you!

monitor undo space usage

user489107Sep 15 2011 — edited Sep 15 2011
Hi ,

i want to monitor the used / free space in my undo tablespaces (RAC) and use the following query to find the used space:

SELECT
tablespace_name,
SUM(bytes) bytes
FROM DBA_UNDO_EXTENTS
WHERE status = 'ACTIVE'
GROUP BY tablespace_name;

then i compare it with the total size of this tablespace...

but this shows a big difference to the output of Enterprise Manager ( Grid Control )..

is it the wrong approach ?

thanks in advance
Comments
Locked Post
New comments cannot be posted to this locked post.
Post Details
Locked on Oct 13 2011
Added on Sep 15 2011
3 comments
734 views