Check all active processes, the latest SQL, and the SQL hit ratio

This script is very useful for Oracle DBAs in the process of tuning and identifying slow SQL. It will provide information about the currently active sessions, the latest SQL, as well as the hit ratio. When the server becomes slow, use this SQL to find out all ACTIVE connections with hit ratio and SQL. It has been tested on Oracle 8.1.x platforms (8.1.5, 8.1.6, and 8.1.7).

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