VisualVM - VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling...
Robot Console - Robot Console is a Message and Event Monitoring Software for IBM i thathas automatic message management, resource monitoring, and log monitoring.
ANTS Memory Profiler - ANTS Memory Profiler is a .
JConsole - Provides information about performance and resource consumption for Java applications.
Get Process Memory - Get Process Memory is a library that provides stats on the memory usage of a process.
Munin - PnP networked resource monitoring tool that can help to answer the what just happened to kill our performance