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This guide explains how to use JDK command-line utilities such as jps, jstat, jinfo, jmap, jhat, and jstack to monitor JVM processes, inspect memory usage, generate heap dumps, and diagnose performance issues, providing command syntax, options, and practical examples.
This article introduces the jps tool for listing Java processes, explains its common options and usage examples, then provides a detailed overview of jstack, including its purpose, command syntax, thread‑state definitions, sample outputs, and practical tips for detecting deadlocks, counting threads, and diagnosing high CPU usage in Java applications.
This guide explains where Java's command‑line tools reside, why they are small wrappers around tools.jar, and provides detailed usage, options, and examples for the most common diagnostics utilities—including jps, jstat, jinfo, jmap, jhat, and jstack—helping developers monitor and troubleshoot JVM processes effectively.
This tutorial explains the three main categories of JVM parameters—standard, X, and XX—demonstrates how to view, modify, and verify them using command‑line tools such as java, jps, and jinfo, and provides step‑by‑step hands‑on labs for each type.