JVM Profiling Tools: Tools like JProfiler, YourKit, and Java Mission Control provide insights into JVM performance, including heap usage, garbage collection statistics, and thread activity.

GC Logging and Analysis: Enabling GC logging using -Xlog:gc and analyzing the logs with tools like GCViewer or GCEasy can help identify GC-related performance issues.

Real-time Monitoring: Using real-time monitoring tools like VisualVM or jConsole for observing the JVM’s performance under load can help in making informed tuning decisions. 

https://medium.com/stackademic/optimizing-java-for-low-latency-applications-803e181d0add