Analyzer java-gc-pause-fgraph

# Name

java-gc-pause-fgraph - Java GC Pause Trigger Flame Graph

This analyzer connects cumulative GC pause time to the Java code that requested the collection when that connection is unambiguous. An explicit System.gc() call can be shown with the Java call path that made the request. Automatic collections and overlapping explicit requests remain under an internal JVM or collector path. Flame graph width means total pause time, not the number of collections.

# 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-gc-pause-fgraph -p PID

# trace a shell command directly
orxray analyzer run java-gc-pause-fgraph -c SHELL_CMD

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

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

# Tracing Multiple Processes

Supported.

# Output Formats

• Flame Graphs

# Author

The OpenResty Inc. Team.

# Copyright

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