Performance Navigator is a graphical PC tool designed for performance analysis and capacity modeling across various platforms, including IBM i, AIX/VIOS, Linux, Solaris, and HP-UX workloads on IBM Power Systems, Oracle, and HP servers. It collects historical performance data with minimal overhead by securely feeding data from collection services, NMON, and/or SAR to the Windows client nightly, updating system history files. The software offers thousands of graphs, custom reports, and features to assist with performance analysis, server consolidation, and upgrades. Its "What If" functionality allows users to model hypothetical scenarios to determine how capacity changes will impact server performance, facilitating precise capacity planning decisions. Additionally, Performance Navigator provides swift problem determination, enabling users to obtain comprehensive summaries of system issues in under two minutes. It supports various platforms.