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How can I find a unused table ?

edited Feb 14, 2014 12:00PM in Database Administration (MOSC) 4 commentsAnswered

Oracle Version 11.2.0.3 PSU5

AIX 6.1

I want to check if there exists tables which nobody used since last instance start - inclusive selects. For this I normally check v$segment_statistics and if I'm  finding no entries for some tables, I thought that this tables aren't used since instance start.

By randomly checking sys.col_usage$ I find entries for such a table with a timestamp from yesterday evening.

Because the  last instance start was in July 2013 I'm wondering that there is no entry in v$segment_statistics.

Is my way, to find table unused correct? Is there any better way?

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