Analyzer lj-dump-loaded-mods

# Name

lj-dump-loaded-mods - Showing the loaded modules of the LuaJIT VM

This analyzer inspects the memory footprint of LuaJIT-based applications by enumerating all loaded Lua modules within the LuaJIT VM. It captures module loading information from applications such as OpenResty, Kong, and APISIX, generating a bar chart that visualizes the loaded module inventory. This analyzer helps identify unnecessary module dependencies, detect memory bloat from excessive module loading, and optimize application startup time and memory consumption.

# Resource Category

Memory.

# Application Type & Technical Stack

• OpenResty
• Kong
• APISIX

# 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 lj-dump-loaded-mods -p PID

# trace a shell command directly
orxray analyzer run lj-dump-loaded-mods -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run lj-dump-loaded-mods -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run lj-dump-loaded-mods --exe /path/to/exe/file

# Tracing Multiple Processes

Supported.

# Output Formats

• Bar Charts
• Plain Texts

# Output Example

[
  {
    "data": [
        [ "module", "type", "version" ], // The title of the table
        [ "resty.zlib", "table", "0.4.0" ],
        [ "cjson", "table", "2.1.0.11" ],
        [ "oredge.log", "table", "-" ]
    ],
    "type": "table",
    "title": "Loaded modules of the Lua VM"
  }
]

# Author

The OpenResty Inc. Team.

# Copyright

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