Featured Articles

Photo by Yichun Zhang
dynamic-tracing
...
openresty-xray bilibili
8 mins read

One String Value Crashed Asia's Biggest Streaming Site — We Found It with OpenResty XRay

One String Value Crashed Asia's Biggest Streaming Site — We Found It with OpenResty XRay

Binary Evidence-Driven Vulnerability Scanning: Eliminating False Positives with OpenResty XRay
security
...
vulnerability openresty-xray cve
9 mins read

Binary Evidence-Driven Vulnerability Scanning: Eliminating False Positives with OpenResty XRay

Binary Evidence-Driven Vulnerability Scanning: Eliminating False Positives with OpenResty XRay

Introduction to OpenResty XRay
openresty-xray
...
nginx
6 mins read

Introduction to OpenResty XRay

Introduction to OpenResty XRay

Anatomy of a 15x Performance Drop: A 90k to 6k QPS Root Cause Analysis with OpenResty XRay
openresty-xray
...
casestudy lua nginx off-cpu
3 mins read

Anatomy of a 15x Performance Drop: A 90k to 6k QPS Root Cause Analysis with OpenResty XRay

Anatomy of a 15x Performance Drop: A 90k to 6k QPS Root Cause Analysis with OpenResty XRay

Building a Non-Invasive Java Function Profiler with OpenResty XRay
openresty-xray
...
java probe
4 mins read

Building a Non-Invasive Java Function Profiler with OpenResty XRay

Building a Non-Invasive Java Function Profiler with OpenResty XRay

Photo by Philip Brown
dynamic-tracing
...
openresty-xray
26 mins read

The Wonderland of Dynamic Tracing (Part 1 of 3)

The Wonderland of Dynamic Tracing (Part 1 of 3)

Photo by Jose G. Ortega Castro
nginx
...
openresty memory openresty-xray dynamic-tracing
13 mins read

How OpenResty and Nginx Shared Memory Zones Consume RAM

How OpenResty and Nginx Shared Memory Zones Consume RAM

Photo by Harrison Broadbent
nginx
...
openresty memory luajit openresty-xray dynamic-tracing
11 mins read

How OpenResty and Nginx Allocate and Manage Memory

How OpenResty and Nginx Allocate and Manage Memory

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Latest Articles

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 5 mins read

Locate Large Memory Objects inside PHP Processes (using OpenResty XRay)

tutorial openresty-xray php memory
  • Problem: high memory usage
  • Use the guided analysis feature of OpenResty XRay to find the largest Perl objects or values taking the most RAM
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high memory usage
  • Use the guided analysis feature of OpenResty XRay to find the largest Perl objects or values taking the most RAM
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResety Edge Jan 30, 2026

OpenResety Edge Updated Jan 30, 2026 5 mins read

Accurately Restore the Real Client IP Address in OpenResty Edge

tutorial openresty-edge proxy real ip
  • Set “Trusted hosts to set real IP” and “Real IP from” Globally
  • Configure the Application to Output the Client Address
  • Check the Client Address Received on OpenResty Edge
  • What is OpenResty Edge
Photo by Yichun Zhang
  • Set “Trusted hosts to set real IP” and “Real IP from” Globally
  • Configure the Application to Output the Client Address
  • Check the Client Address Received on OpenResty Edge
  • What is OpenResty Edge

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 7 mins read

Use C++ to Dynamic-Trace C++ Applications

stl c++ ebpf openresty-xray dynamic-tracing
  • Setting Up the Target C++ Program
  • Crafting the C++ (or Y++) Analyzer
  • Operationalizing the Target and Analyzer
  • Advancing Support for Complex C++ Applications
  • About the Debug Symbols
Photo by Yichun Zhang
  • Setting Up the Target C++ Program
  • Crafting the C++ (or Y++) Analyzer
  • Operationalizing the Target and Analyzer
  • Advancing Support for Complex C++ Applications
  • About the Debug Symbols

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 4 mins read

Install OpenResty XRay’s Agents on Amazon Linux via Package Bundles

tutorial openresty-xray Amazon-linux2 Agent install
  • Logging in to the Console
  • Installing the Agent via Bundle Packages
  • Configuring and Detecting Applications
  • Initiating Analyzers and Viewing Insights
  • Install Another Agent
  • What is OpenResty XRay
  • Logging in to the Console
  • Installing the Agent via Bundle Packages
  • Configuring and Detecting Applications
  • Initiating Analyzers and Viewing Insights
  • Install Another Agent
  • What is OpenResty XRay

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 6 mins read

Pinpointing the Hottest Go Code Paths with High Disk I/O (using OpenResty XRay)

tutorial openresty-xray go golang disk I/O
  • Problem: high disk I/O
  • Use the guidede analysis feature of OpenResty XRay to spot the problematic Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high disk I/O
  • Use the guidede analysis feature of OpenResty XRay to spot the problematic Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 5 mins read

Control Access to DNS Applications in OpenResty Edge's Admin Console

tutorial openresty-edge DNS user management
  • Check DNS page permissions as a super user
  • Create a user group with only read permission for this DNS application
  • Create a tester account
  • See the DNS applications with permission granted
  • What is OpenResty Edge
  • Check DNS page permissions as a super user
  • Create a user group with only read permission for this DNS application
  • Create a tester account
  • See the DNS applications with permission granted
  • What is OpenResty Edge

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 6 mins read

How CPU Time is Spent inside Envoy Servers (using OpenResty XRay)

tutorial openresty-xray CPU Envoy
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive C++ code paths inside Envoy Servers
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive C++ code paths inside Envoy Servers
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 5 mins read

Pinpointing the hottest PHP code paths with high CPU usage (using OpenResty XRay)

tutorial openresty-xray PHP CPU
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the CPU-hottest PHP code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the CPU-hottest PHP code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 5 mins read

Call Lua modules by Edgelang in OpenResty Edge

tutorial openresty-edge Lua Edgelang
  • Create a Lua module in OpenResty Edge
  • Call the Lua module in an HTTP application of OpenResty Edge
  • Verify the effect of calling the Lua module
  • What is OpenResty Edge
  • Create a Lua module in OpenResty Edge
  • Call the Lua module in an HTTP application of OpenResty Edge
  • Verify the effect of calling the Lua module
  • What is OpenResty Edge

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 6 mins read

How CPU Time is Spent inside PHP Laravel Apps (using OpenResty XRay)

tutorial openresty-xray Laravel PHP
  • Problem: high CPU usage
  • Use the Guidede Analysis Feature of OpenResty XRay to Analyze CPU Distribution in Laravel Application
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the Guidede Analysis Feature of OpenResty XRay to Analyze CPU Distribution in Laravel Application
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 6 mins read

Find Blocking Perl Code Paths Holding back CPU Usage (Using OpenResty XRay)

tutorial openresty-xray perl off-cpu
  • Problem: low CPU usage
  • Use the guided analysis feature of OpenResty XRay to spot the blocking Perl code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • About The Author
  • Problem: low CPU usage
  • Use the guided analysis feature of OpenResty XRay to spot the blocking Perl code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • About The Author

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 6 mins read

Pinpointing CPU-Hottest Go Code Paths Inside Prometheus (using OpenResty XRay)

tutorial openresty-xray prometheus garbage collection go golang
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the CPU-hottest Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the CPU-hottest Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
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