Analyzer java-class-loading

# Name

java-class-loading - Java Class Loading and Initialization

This analyzer watches the main HotSpot class pipeline: finding and loading a class, reading its class file, linking it with its superclasses and interfaces, and running class initialization. It produces a bar chart of completed pipeline events and separate duration histograms for loading, parsing, linking, and initialization, so Java developers can see which phase is taking time during startup or warmup.

# Resource Category

Latency.

# 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-class-loading -p PID

# trace a shell command directly
orxray analyzer run java-class-loading -c SHELL_CMD

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

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

# Tracing Multiple Processes

Supported.

# Output Formats

• Bar Charts
• Histogram Bar Charts
• Plain Texts

# Author

The OpenResty Inc. Team.

# Copyright

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