Analyzer ngx-lua-sleep-fgraph

# Name

ngx-lua-sleep-fgraph - Nginx Lua Sleep Flame Graph

This analyzer monitors the sleep call stack in Nginx Lua applications such as OpenResty, Kong, and APISIX. It captures timing data for ngx.sleep() invocations across the application. The analyzer generates flame graph that reveal ngx.sleep() call stack, helping identify unnecessary delays and optimize request processing latency.

# Resource Category

Miscellaneous.

# 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 ngx-lua-sleep-fgraph -p PID

# trace a shell command directly
orxray analyzer run ngx-lua-sleep-fgraph -c SHELL_CMD

# PGID is the process group ID or any process's PID within the target process
# group.
orxray analyzer run ngx-lua-sleep-fgraph -p -PGID

# trace any processes started from the specified executable path.
orxray analyzer run ngx-lua-sleep-fgraph --exe /path/to/exe/file

# Tracing Multiple Processes

Supported.

# Output Formats

• Flame Graphs
• Plain Texts

# Author

The OpenResty Inc. Team.

# Copyright

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