OProfile - OProfile is an open source project that includes a statistical profiler, capable of profiling all running code at low overhead.

strace - Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.

VisualVM - VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling...

perf - Perf is a simple app monitoring solution paired with meaningful alerts.

MemoryLogic - MemoryLogic offers tools to add process id and memory usage in rails logs and to track memory leaks.

ltrace - ltrace intercepts and records dynamic library calls which are called by an executed process and the...