DevConf.CZ 2020

This presentation will discuss the RHEL system configuration and tuning for optimal performance. We split the presentation up into 5 sections: 1.) We will discuss a variety of system architectures and topologies supported by RHEL, starting with smaller 2-node NUMA systems with 8CPUs up to much larger systems with 32 nodes and 2048 CPUs. 2.) We will discuss how to maximize overall system bandwidth and minimizing latency for a variety of benchmarks and real-world applications. 3.) We discuss overall system tuning and tuning parameters as well as various system tools used to monitor and alter system performance. 4.) We will give concrete examples of performance analysis and tuning of actual customer systems running a variety of applications on RHEL. 5.) Finally we will discuss some of the new features in RHEL8 such as 5-level page tables, NVRAM support and Cgroups V2, etc.