Featured Articles

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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

How CPU Time is Spent inside Go’s CockroachDB (using OpenResty XRay)

tutorial openresty-xray cpu Go CockroachDB
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive 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 most CPU-intensive Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Apr 10, 2026

OpenResty XRay Updated Apr 10, 2026 5 mins read

Performance Overhead of OpenResty XRay when Tracing Perl Apps

tutorial openresty-xray perl overhead
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 5 mins read

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

tutorial openresty-xray perl 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

OpenResty XRay Apr 10, 2026

OpenResty XRay Updated Apr 10, 2026 2 mins read

Measuring the Performance Overhead of OpenResty XRay When Profiling Go Applications

tutorial openresty-xray go overhead
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 5 mins read

Install OpenResty XRay’s Agents on Ubuntu via Deb Packages

tutorial openresty-xray Ubuntu Agent install
  • Logging in to the Console
  • Installing the Agent via Deb Packages
  • Checking the Agent Status and Logs
  • 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 Deb Packages
  • Checking the Agent Status and Logs
  • Configuring and Detecting Applications
  • Initiating Analyzers and Viewing Insights
  • Install Another Agent
  • What is OpenResty XRay

OpenResty XRay Apr 10, 2026

OpenResty XRay Updated Apr 10, 2026 2 mins read

Performance Impact of OpenResty XRay when Tracing PHP Apps

tutorial openresty-xray php overhead
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay

OpenResty XRay Apr 10, 2026

OpenResty XRay Updated Apr 10, 2026 2 mins read

Performance Impact of OpenResty XRay when Tracing Python Apps

tutorial openresty-xray python overhead
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay

OpenResty XRay Apr 10, 2026

OpenResty XRay Updated Apr 10, 2026 3 mins read

Tested in Production: The Performance Impact of OpenResty XRay When Tracing Rust Applications

tutorial openresty-xray rust overhead
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay
  • Process Performance Before Running Analysis
  • Performance Impact When the Analyzer is Running
  • Impact Measurement on Throughput and Latency
  • What is OpenResty XRay

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 4 mins read

Dynamic-Tracing Custom Go Programs with Custom Ylang Analyzers (using OpenResty XRay)

tutorial openresty-xray ylang analyzer Go
  • Insert two key-value Pairs into a Go Variable
  • Write a Customize Ylang Analyzer to Dynamically Trace the Go program
  • Test the Results
  • What is OpenResty XRay
  • Insert two key-value Pairs into a Go Variable
  • Write a Customize Ylang Analyzer to Dynamically Trace the Go program
  • Test the Results
  • What is OpenResty XRay

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 4 mins read

Adding Custom Response Headers in OpenResty Edge

tutorial openresty-edge
  • Add New Respond Header and Use String As Value
  • Use “System Hostname” As a Built-in Variable for Value
  • Add New Respond Header and Use String As Value
  • Use “System Hostname” As a Built-in Variable for Value

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 6 mins read

How Python Django's Application Uses Memory Internally (Using OpenResty XRay)

tutorial openresty-xray python memory django
  • Problem: high memory usage
  • Use the guidede analysis feature of OpenResty XRay to analyze the django application
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high memory usage
  • Use the guidede analysis feature of OpenResty XRay to analyze the django application
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 4 mins read

Install OpenResty XRay’s Agents on CentOS via RPM Packages

tutorial openresty-xray CentOS Agent install
  • Logging in to the Console
  • Installing the Agent via RPM Packages
  • Checking the Agent Status and Logs
  • 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 RPM Packages
  • Checking the Agent Status and Logs
  • 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 5 mins read

Find the largest Python objects or values taking the most RAM (using OpenResty XRay)

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

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 6 mins read

How CPU time is spent inside Rust’s Sled library (using OpenResty XRay)

tutorial openresty-xray cpu Sled Rust
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive Rust 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 most CPU-intensive Rust code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
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