Which action can help avoid performance issues during heavy load on a portal?

Conducting tests to simulate heavy load is a proactive approach that allows organizations to assess how their portal performs under stress before facing actual high-traffic situations. By running these load tests, developers can pinpoint potential bottlenecks, resource limitations, and areas where performance may degrade. This practice provides valuable insight into user experience and system behavior during peak usage times, enabling teams to implement optimizations and improvements prior to any real-world impact.

While performing user acceptance testing (UAT) helps identify bugs, it is not specifically designed to assess performance under heavy load. Utilizing a Content Delivery Network (CDN) is an effective method for improving content delivery speed but does not directly address the underlying performance issues without prior testing to identify those issues. Shutting down all processes is an extreme and impractical solution that would certainly hinder service rather than help maintain portal performance. Therefore, simulating heavy load through dedicated testing remains the most viable option for preventing performance issues.