Database Administration (MOSC)

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Calculate actual segments size

edited Apr 20, 2010 6:40AM in Database Administration (MOSC) 3 commentsAnswered
 I have a database (DB1) with 100GB in size, i would like to export DB1 and import into another DB (DB2) which has 200GB in size.

On DB1 I select sum(bytes) from dba_segments to get all the actual allocation objects size in the DB, that is around 80GB. I know that after export from DB1 and import into DB2, I will have more space save due to possible fragmentation on each of the objects.

How do i check on DB1 to get the actual space size after import into DB2 without actually doing export and import?

Best regards

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