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

OpenResety Edge Jun 26, 2026

OpenResety Edge Updated Jun 26, 2026 6 mins read

Configure HTTP basic auth in OpenResty Edge

tutorial openresty-edge authentication basic-auth
  • Configure the HTTP basic auth credentials for applications
    • Add a basic auth user group
    • Enable the basic authentication
    • Test
  • Configure the global HTTP basic auth
    • Add a global basic auth user group
    • Configure the global auth for application
Photo by Yichun Zhang
  • Configure the HTTP basic auth credentials for applications
    • Add a basic auth user group
    • Enable the basic authentication
    • Test
  • Configure the global HTTP basic auth
    • Add a global basic auth user group
    • Configure the global auth for application

OpenResty XRay Aug 6, 2026

OpenResty XRay Updated Aug 6, 2026 15 mins read

Ylang in Production: Container Tracing, Stack Unwinding & Core Dumps (Series Part 4)

ylang openresty-xray dynamic-tracing
  • Transparent Container Tracing
  • Efficient Stack Unwinding
  • Analyzing Dead Processes (Core Dumps)
  • Very Low Tracing Overhead
  • Standard Ylang Libraries & Tools
  • Network Filtering & Control
  • The Ylang Compiler’s Implementation
  • Operating System Support
  • Contributions to Open-Source Communities
Photo by Yichun Zhang
  • Transparent Container Tracing
  • Efficient Stack Unwinding
  • Analyzing Dead Processes (Core Dumps)
  • Very Low Tracing Overhead
  • Standard Ylang Libraries & Tools
  • Network Filtering & Control
  • The Ylang Compiler’s Implementation
  • Operating System Support
  • Contributions to Open-Source Communities

OpenResty XRay Aug 6, 2026

OpenResty XRay Updated Aug 6, 2026 11 mins read

Ylang: Regex, Full Control Flow & Transparent Debug Symbol Handling (Series Part 3)

ylang openresty-xray dynamic-tracing
  • The Language Syntax (Continued)
    • String Literals
    • Built-in Regex Support
    • Full Control-Flow Support
    • Floating-Point Number Support
    • Compared to Open-Source Toolchains
  • Transparent Debug Symbol Handling
    • Debug Symbols: No Runtime Overhead
    • Centralized Package Database
    • Fuzzy Matching Debug Symbols
Photo by Yichun Zhang
  • The Language Syntax (Continued)
    • String Literals
    • Built-in Regex Support
    • Full Control-Flow Support
    • Floating-Point Number Support
    • Compared to Open-Source Toolchains
  • Transparent Debug Symbol Handling
    • Debug Symbols: No Runtime Overhead
    • Centralized Package Database
    • Fuzzy Matching Debug Symbols

OpenResty XRay Aug 6, 2026

OpenResty XRay Updated Aug 6, 2026 15 mins read

Ylang: A Dynamic Tracing Language for eBPF, SystemTap, GDB, and More (Part 1 of 4)

ylang openresty-xray dynamic-tracing
  • What is Dynamic Tracing
  • Why the “Y” Name
  • Getting Started with Ylang
  • Dynamic Tracing Backends: eBPF+, Stap+, GDB, and ODB
  • Why a Unified Frontend Language for Dynamic Tracing
  • The Ylang Syntax: Genuinely C-Compatible
  • Frequently Asked Questions
Photo by Yichun Zhang
  • What is Dynamic Tracing
  • Why the “Y” Name
  • Getting Started with Ylang
  • Dynamic Tracing Backends: eBPF+, Stap+, GDB, and ODB
  • Why a Unified Frontend Language for Dynamic Tracing
  • The Ylang Syntax: Genuinely C-Compatible
  • Frequently Asked Questions

OpenResety Edge Jun 26, 2026

OpenResety Edge Updated Jun 26, 2026 5 mins read

Gateway Config's Version Control & Release Management in OpenResty Edge

tutorial openresty-edge page-rule releases version-control
  • Create a page rule for the sample application
  • Release the page rule
  • Test
  • Modify the page rule
  • Release the modification
  • Test the modification
  • Revert the release
  • Test of the release reverting
Photo by Yichun Zhang
  • Create a page rule for the sample application
  • Release the page rule
  • Test
  • Modify the page rule
  • Release the modification
  • Test the modification
  • Revert the release
  • Test of the release reverting

OpenResety Edge Aug 24, 2026

OpenResety Edge Updated Aug 24, 2026 6 mins read

Redirect to different URIs Based on Clients' Language Settings (OpenResty Edge)

tutorial openresty-edge redirect languages
  • The origin site which supports different languages
  • Create a page rule for redirection
  • Test the new page rule
  • Add a new page rule to redirect to the English page
  • Test the new page rule
Photo by Yichun Zhang
  • The origin site which supports different languages
  • Create a page rule for redirection
  • Test the new page rule
  • Add a new page rule to redirect to the English page
  • Test the new page rule

OpenResty Open Source Aug 24, 2026

OpenResty Open Source Updated Aug 24, 2026 2 mins read

OpenResty 1.19.9.1 released

openresty releases
  • Version highlights
  • Full Changelog
  • Alpine 3.14 official release
  • Version highlights
  • Full Changelog
  • Alpine 3.14 official release

OpenResety Edge Jul 29, 2026

OpenResety Edge Updated Jul 29, 2026 8 mins read

Automatic Let's Encrypt SSL Renewal, No Cron — OpenResty Edge

tutorial openresty-edge ssl certificates lets-encrypt
  • Add the domains to your Edge application
  • Issue and auto-renew a Let’s Encrypt SSL certificate
  • Verify HTTPS and the Let’s Encrypt certificate on a gateway
Photo by Yichun Zhang
  • Add the domains to your Edge application
  • Issue and auto-renew a Let’s Encrypt SSL certificate
  • Verify HTTPS and the Let’s Encrypt certificate on a gateway

OpenResty Open Source Aug 24, 2026

OpenResty Open Source Updated Aug 24, 2026 2 mins read

OpenResty 1.19.9.1 RC1 is out

openresty releases
  • Source package
  • Windows binary packages
  • Version highlights
  • Source package
  • Windows binary packages
  • Version highlights

OpenResety Edge Jul 29, 2026

OpenResety Edge Updated Jul 29, 2026 6 mins read

Upload SSL Certificates for HTTPS Sites in OpenResty Edge

tutorial openresty-edge ssl certificates
  • Upload the SSL certificate and private key in the Edge console
  • Push the new certificate without a server reload or restart
  • Test the uploaded certificate with curl –resolve
Photo by Yichun Zhang
  • Upload the SSL certificate and private key in the Edge console
  • Push the new certificate without a server reload or restart
  • Test the uploaded certificate with curl –resolve

OpenResety Edge Aug 10, 2026

OpenResety Edge Updated Aug 10, 2026 6 mins read

How to Run a Real-Time Cache Purge Network-Wide in OpenResty Edge

tutorial openresty-edge proxy cache purge
  • Create a real-time cache purge job in OpenResty Edge
  • Verify the cache status with the Cache-Status header
  • Purge cache across the whole network with no reload
  • Purge cache by URL prefix
  • Custom purge conditions
  • FAQ
Photo by Yichun Zhang
  • Create a real-time cache purge job in OpenResty Edge
  • Verify the cache status with the Cache-Status header
  • Purge cache across the whole network with no reload
  • Purge cache by URL prefix
  • Custom purge conditions
  • FAQ

OpenResety Edge Aug 10, 2026

OpenResety Edge Updated Aug 10, 2026 7 mins read

Enable HTTP Cache in OpenResty Edge: Proxy Cache Without Cache-Control Headers

tutorial openresty-edge proxy cache
  • Enable proxy cache in a page rule and set the cache key
  • Test the cache and verify Cache-Status HIT/MISS with curl
  • Enforce caching without a Cache-Control header
  • Frequently asked questions
Photo by Yichun Zhang
  • Enable proxy cache in a page rule and set the cache key
  • Test the cache and verify Cache-Status HIT/MISS with curl
  • Enforce caching without a Cache-Control header
  • Frequently asked questions
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