Featured Articles

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

How a Single "0" Took Down Bilibili — Every Server at 100% CPU, and Reboots Didn't Help

How a Single "0" Took Down Bilibili — Every Server at 100% CPU, and Reboots Didn't Help

Binary Vulnerability Scanning: Catch Backported Patches, Cut False Positives
security
...
vulnerability openresty-xray cve
10 mins read

Binary Vulnerability Scanning: Catch Backported Patches, Cut False Positives

Binary Vulnerability Scanning: Catch Backported Patches, Cut False Positives

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

Introduction to OpenResty XRay

Introduction to OpenResty XRay

Nginx Reverse Proxy QPS Dropped 15x: A Missing upstream keepalive and an -O0 Debug Build
openresty-xray
...
case-study lua nginx off-cpu
4 mins read

Nginx Reverse Proxy QPS Dropped 15x: A Missing upstream keepalive and an -O0 Debug Build

Nginx Reverse Proxy QPS Dropped 15x: A Missing upstream keepalive and an -O0 Debug Build

Non-Invasive Java Profiler: Capture Method Arguments in Production Without a Java Agent
openresty-xray
...
java probe
4 mins read

Non-Invasive Java Profiler: Capture Method Arguments in Production Without a Java Agent

Non-Invasive Java Profiler: Capture Method Arguments in Production Without a Java Agent

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
13 mins read

Nginx Memory Usage Explained: Where the RAM Actually Goes

Nginx Memory Usage Explained: Where the RAM Actually Goes

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Latest Articles

OPENRESTY Aug 24, 2026

OPENRESTY Updated Aug 24, 2026 6 mins read

Minify HTML, CSS & JS Inside Nginx: OpenResty's 120 MB/s Streaming Minifiers

nginx lua private-library tls
  • When You Can’t Touch the Build Pipeline
  • Why a Regex Won’t Cut It
  • Three Approaches That Almost Work
  • A Streaming FSM for Each Language, Compiled to Native Code
  • Five-Minute Setup: A Configuration Example
  • Four Things to Know Before Going Live
  • When You Can’t Touch the Build Pipeline
  • Why a Regex Won’t Cut It
  • Three Approaches That Almost Work
  • A Streaming FSM for Each Language, Compiled to Native Code
  • Five-Minute Setup: A Configuration Example
  • Four Things to Know Before Going Live

OpenResty XRay Jul 23, 2026

OpenResty XRay Updated Jul 23, 2026 10 mins read

Binary Vulnerability Scanning: Catch Backported Patches, Cut False Positives

security vulnerability openresty-xray cve
  • Why Version-Matching Vulnerability Scanning Fails: Three Compounding Costs
  • How OpenResty XRay’s Binary Vulnerability Scanning Works: The Evidence-First Model
  • Case Study: Binary Vulnerability Scanning on Rocky Linux with Dual OpenSSL Versions
  • From Alert Fatigue to Precision: A Sustainable Vulnerability Scanning Practice
  • Why Version-Matching Vulnerability Scanning Fails: Three Compounding Costs
  • How OpenResty XRay’s Binary Vulnerability Scanning Works: The Evidence-First Model
  • Case Study: Binary Vulnerability Scanning on Rocky Linux with Dual OpenSSL Versions
  • From Alert Fatigue to Precision: A Sustainable Vulnerability Scanning Practice

OPENRESTY Aug 24, 2026

OPENRESTY Updated Aug 24, 2026 12 mins read

P99 Latency in a D Service Cut 73%: Conservative GC Meets an O(n) Query Under Load

d-lang flame-graph performance garbage-collection
  • Analyzing GC Traps and Business Hotspots in the Flame Graph
  • Optimization Roadmap: Why Sequence Is More Important Than Action
  • Conclusion: From Code Logic to Runtime Reality
  • Analyzing GC Traps and Business Hotspots in the Flame Graph
  • Optimization Roadmap: Why Sequence Is More Important Than Action
  • Conclusion: From Code Logic to Runtime Reality

OpenResety Edge Jun 26, 2026

OpenResety Edge Updated Jun 26, 2026 6 mins read

End-to-End Client Real IP Passthrough in OpenResty Edge

openresty-edge
  • Use Cases and Topology
  • IP Passthrough Methods Overview
  • OpenResty Edge Configuration
  • Key Variables
  • Page Rules
  • Verification
  • Use Cases and Topology
  • IP Passthrough Methods Overview
  • OpenResty Edge Configuration
  • Key Variables
  • Page Rules
  • Verification

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 13 mins read

How OpenResty XRay Enables Full-Stack Dynamic Tracing in Production

openresty-xray ylang dynamic-tracing
  • Where Do Existing Dynamic Tracing Frameworks Fall Short in Production?
  • How Did OpenResty XRay Rethink Dynamic Tracing at the Architecture Level?
  • What Is a Full-Stack Flame Graph and How Do You Use It to Diagnose Performance Bottlenecks?
  • How Is OpenResty XRay Expanding Its Observability Coverage Over Time?
  • Further Reading and Real-World Case Studie
  • Where Do Existing Dynamic Tracing Frameworks Fall Short in Production?
  • How Did OpenResty XRay Rethink Dynamic Tracing at the Architecture Level?
  • What Is a Full-Stack Flame Graph and How Do You Use It to Diagnose Performance Bottlenecks?
  • How Is OpenResty XRay Expanding Its Observability Coverage Over Time?
  • Further Reading and Real-World Case Studie

OpenResety Edge Jun 26, 2026

OpenResety Edge Updated Jun 26, 2026 5 mins read

OpenResty Edge: Private CDN, Universal Gateway & WAF in One Platform

openresty-edge
  • What Is OpenResty Edge? Architecture Overview
  • OpenResty Edge vs. Traditional Stack: 4 Problems Solved
  • Universal Gateway & Load Balancing: Dynamic Routing for Microservices
  • Real-World Case Studies: OTA, News, and SaaS Deployments
  • What Is OpenResty Edge? Architecture Overview
  • OpenResty Edge vs. Traditional Stack: 4 Problems Solved
  • Universal Gateway & Load Balancing: Dynamic Routing for Microservices
  • Real-World Case Studies: OTA, News, and SaaS Deployments

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 6 mins read

Introduction to OpenResty XRay

openresty-xray nginx
  • Core Philosophy: A Tracing Engine Built for the Unknown
  • Turning Noise into Signal: How XRay Demystifies Production Issues
  • Empowering Engineering Teams in Cloud-Native Reality
  • Built on a Robust, Open Technological Foundatione
  • Real-World Success Stories
  • Core Philosophy: A Tracing Engine Built for the Unknown
  • Turning Noise into Signal: How XRay Demystifies Production Issues
  • Empowering Engineering Teams in Cloud-Native Reality
  • Built on a Robust, Open Technological Foundatione
  • Real-World Success Stories

OPENRESTY Jul 7, 2026

OPENRESTY Updated Jul 7, 2026 12 mins read

lua-resty-kafka Blocking Your Nginx Workers? Meet lua-resty-kafka-fast

private-library kafka lua
  • Three Common Anti-Patterns We See in Production
  • What is lua-resty-kafka-fast
  • lua-resty-kafka vs lua-resty-kafka-fast
  • What This Changes at the Architecture Level
  • FAQ
  • Three Common Anti-Patterns We See in Production
  • What is lua-resty-kafka-fast
  • lua-resty-kafka vs lua-resty-kafka-fast
  • What This Changes at the Architecture Level
  • FAQ

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 4 mins read

Nginx Reverse Proxy QPS Dropped 15x: A Missing upstream keepalive and an -O0 Debug Build

openresty-xray case-study lua nginx off-cpu
  • A 15x Slower Nginx Reverse Proxy — and No Errors in the Logs
  • Flame Graphs Expose a Connection Storm: The Missing upstream keepalive
  • The Remaining 10% Gap: Baseline Comparison Points to the Compiler
  • How an -O0 Debug Build Cost Us 10% of Performance
  • A 15x Slower Nginx Reverse Proxy — and No Errors in the Logs
  • Flame Graphs Expose a Connection Storm: The Missing upstream keepalive
  • The Remaining 10% Gap: Baseline Comparison Points to the Compiler
  • How an -O0 Debug Build Cost Us 10% of Performance

OpenResty Open Source Aug 24, 2026

OpenResty Open Source Updated Aug 24, 2026 6 mins read

TLS Session Resumption in Nginx Clusters: Zero-Downtime Key Rotation

private-library nginx lua openresty tls
  • Why Session Ticket Key Management Is Harder Than It Looks
  • How lua-resty-tls-session Rotates Session Ticket Keys Without Restarts
  • Comparing the Three Approaches
  • Quantifying Latency Reduction and Uptime Gains
  • FAQ
  • Why Session Ticket Key Management Is Harder Than It Looks
  • How lua-resty-tls-session Rotates Session Ticket Keys Without Restarts
  • Comparing the Three Approaches
  • Quantifying Latency Reduction and Uptime Gains
  • FAQ

OpenResety Edge Aug 4, 2026

OpenResety Edge Updated Aug 4, 2026 5 mins read

WAF Benchmark: OpenResty Edge 3.7–10x Faster than ModSecurity (208 Rules)

tutorial openresty-edge waf
  • The Benchmark: 208 WAF Rules on One CPU Core
  • Why Rule Count Doesn’t Have to Hurt WAF Performance
  • How to Implement a WAF at the Edge: Four Steps
  • FAQ: WAF performance
  • The Benchmark: 208 WAF Rules on One CPU Core
  • Why Rule Count Doesn’t Have to Hurt WAF Performance
  • How to Implement a WAF at the Edge: Four Steps
  • FAQ: WAF performance

OpenResty XRay Aug 11, 2026

OpenResty XRay Updated Aug 11, 2026 10 mins read

Fix LuaJIT RSS Memory Leak in OpenResty: Stop OOM Kills Without Restarts

memory openresty-xray luajit private-library
  • What Is the LuaJIT Pseudo Memory Leak?
  • Diagnosing the Problem with Real Production Data
  • Why Standard Fixes Don’t Work
  • How LuaJIT-plus Fixes This at the Allocator Level
  • Production Impact After Deployment
  • What Is the LuaJIT Pseudo Memory Leak?
  • Diagnosing the Problem with Real Production Data
  • Why Standard Fixes Don’t Work
  • How LuaJIT-plus Fixes This at the Allocator Level
  • Production Impact After Deployment

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 9 mins read

How We Pinpointed a 244ms Latency Spike in a 500k QPS OpenResty Gateway

openresty-xray qps p99 cpu
  • Latency Spikes and CPU Waste Hidden Beneath Healthy Averages
  • Troubleshooting OpenResty Latency Without Code Changes or Restarts
  • The Results: Latency Spikes Eliminated, 30% Lower CPU Usage
  • Frequently Asked Questions
  • Latency Spikes and CPU Waste Hidden Beneath Healthy Averages
  • Troubleshooting OpenResty Latency Without Code Changes or Restarts
  • The Results: Latency Spikes Eliminated, 30% Lower CPU Usage
  • Frequently Asked Questions
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