As an implementer of commercial and open source database monitoring tools I find DatabaseRX has capabilities that clearly differentiate it from the rest of the market:

• Scalability - hundreds of databases and instances can be added with trivial monitoring overhead, due in part to a highly normalized data model, message based architecture and modular design (loader,analyzer,notifier).
• Security - DatabaseRX agents don’t require root/oracle or DBA privileges to fully report operational and trending issues.
• Network Access Control -  DatababaseRX does not expose databases externally - it only requires a periodic encrypted SMTP push from the database or proxy host.
• Documentation and Global Search - Delaying  problem resolution for lack of information is inexcusable - the DatabaseRX monitoring portal includes everything related to escalation contacts, vendor support, access control, prior events and reports.

The last point - “one place to go” for problem identification, resource engagement, resolution and root cause documentation has proven to me during live events that there can be significant reductions in unexpected downtime simply based on that efficiency.