少於1分鐘 | 最後修改: 0001-01-01, 0:00:00 am

Analyzer java-off-cpu

Name

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

This analyzer profiles off-CPU time consumption in Java-land code execution within JVM applications. It captures stack traces when Java threads are blocked or waiting, such as during I/O operations, lock contention, or thread synchronization. The analyzer generates flame graphs that visualize blocking time distribution, helping identify concurrency issues, lock contention, and I/O bottlenecks in Java applications.

Resource Category

off-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-off-cpu -p PID

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

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

# trace any processes started from the specified executable path.
orxray analyzer run java-off-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.