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Some Oracle performance problems announce themselves loudly with blocking sessions, failed jobs, or storage alerts.
Cursor-related issues usually do the opposite.
The database slowly becomes inconsistent. CPU rises during peak hours. Application response time fluctuates. AWR reports start showing library cache waits and excessive parsing activity even though the SQL itself does not look particularly heavy.
Index maintenance is a hot topic among DBAs .. that too, especially when it comes to performance tuning. Rebuilding indexes can feel like a magic bullet but, in reality, it’s rarely needed and often overused. In this article, we will cut through the noise, explain when rebuilding makes sense, and give you actionable criteria and examples to decide confidently whether to rebuild, coalesce, or leave indexes alone.