But for most cases you should be good enough with:
Application Performance Management (APM):
The Application Performance Management (APM) SuiteApp compiles information into a performance dashboard that is useful for performance troubleshooting. You can use this SuiteApp to monitor and manage NetSuite performance for business critical operations.
Visual indicators on the dashboard highlight performance issues and anomalies, with more details available on portlets and quick links. Aside from the performance dashboard, this SuiteApp also includes dashboards for page time summary, SuiteScript analysis, and script queue monitor.