This article discusses the importance of identifying and troubleshooting host performance and configuration issues in IT systems. Recognizing signs such as slow system performance, frequent crashes and errors, inability to access resources, high CPU and memory usage, and other issues is crucial. The causes of these problems are often outdated hardware and software, inadequate system resources, incorrect configuration, software bugs and compatibility issues. To resolve these issues, it's essential to use infrastructure monitoring platforms like New Relic, which provide a holistic view of the system and help identify correlations between configurations and performance. Implementing best practices such as regular system audits, timely updates and patches, adequate resource allocation, optimized configuration settings, preventive maintenance, and leveraging monitoring tools can also optimize host performance and configuration. By following these steps, businesses can maximize their IT system's potential, maintain operational efficiency, and boost overall business productivity.