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Analyzer java-on-cpu

Name

java-on-cpu - Java-Land on-CPU Flame Graph

This analyzer profiles on-CPU time consumption in Java-land code execution within JVM applications. It captures stack traces from Java methods and native calls during active CPU execution. The analyzer generates flame graphs that visualize CPU time distribution across Java method calls, helping identify performance bottlenecks, inefficient code paths, and computational hotspots in Java applications.

Resource Category

CPU.

Application Type & Technical Stack

  • Java

Command Line Syntax

The analyzer can be invoked directly on the command-line via the orxray utility from the openresty-xray-cli software package.

Alternatively, the analyzer can also be invoked manually or automatically on the web console UI of OpenResty XRay (like on the Advanced web page).

# PID is the target process PID.
orxray analyzer run java-on-cpu -p PID

# trace a shell command directly
orxray analyzer run java-on-cpu -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run java-on-cpu -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run java-on-cpu --exe /path/to/exe/file

Tracing Multiple Processes

Supported.

Output Formats

  • Flame Graphs

Author

The OpenResty Inc. Team.

Copyright (C) by OpenResty Inc. All rights reserved.