Featured Articles

dynamic-tracing6 mins read

Resolving Bilibili’s major site incident with OpenResty XRay

openresty-xray6 mins read

When Lua IPC Pipes Block OpenResty or Nginx's Event Loops

dynamic-tracing26 mins read

The Wonderland of Dynamic Tracing (Part 1 of 3)

openresty-xray10 mins read

Automatic Analysis Reports in OpenResty XRay

nginx19 mins read

Introduction to Lua-Land CPU Flame Graphs

nginx10 mins read

Memory Fragmentation in OpenResty and Nginx's Shared Memory Zones

nginx13 mins read

How OpenResty and Nginx Shared Memory Zones Consume RAM

nginx11 mins read

How OpenResty and Nginx Allocate and Manage Memory

OpenResty XRay reduce your CPU usage up to 90%

OpenResty XRay reduce your CPU usage up to 90%

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Latest Articles

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 11 mins read

Tracing the Slowest PCRE Regular Expressions in OpenResty or Nginx Processes

System Environment
Narrowing Down the Culprit without Guessing
Limiting the execution overhead of PCRE
Non-Backtracking Regular Expression Engines
Lua’s Builtin Patterns
Tracing Applications inside Containers
How The Tools are Implemented
The Overhead of the Tools

System Environment
Narrowing Down the Culprit without Guessing
Limiting the execution overhead of PCRE
Non-Backtracking Regular Expression Engines
Lua’s Builtin Patterns
Tracing Applications inside Containers
How The Tools are Implemented
The Overhead of the Tools

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 9 mins read

Listing Loaded Lua Modules in OpenResty or Nginx Processes

ylua openresty-xray openresty nginx lua dynamic-tracing

System Environment
Names of Loaded Lua Modules
Running Directly in the Web Console
Tracing Applications inside Containers
How The Tools are Implemented
The Overhead of the Tools

System Environment
Names of Loaded Lua Modules
Running Directly in the Web Console
Tracing Applications inside Containers
How The Tools are Implemented
The Overhead of the Tools

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 12 mins read

Analyzing the Most CPU-Consuming Requests in OpenResty or Nginx

openresty tutorial cpu nginx openresty-xray ysql

System Environment
CPU-Hottest Request Hostnames
CPU-Hottest Request URIs
Digging Deeper
Running Directly in the Web Console
Tracing Applications inside Containers
How The Tools are Implemented
The Overhead of the Tools

System Environment
CPU-Hottest Request Hostnames
CPU-Hottest Request URIs
Digging Deeper
Running Directly in the Web Console
Tracing Applications inside Containers
How The Tools are Implemented
The Overhead of the Tools

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 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

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

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 6 mins read

How to use custom dynamic metrics in OpenResty Edge

tutorial openresty-edge metrics monitor

Introduction to dynamic metrics
Create custom dynamic metrics for the sample application
Test

Introduction to dynamic metrics
Create custom dynamic metrics for the sample application
Test

OpenResety Edge Jun 17, 2025

OpenResety Edge Updated Jun 17, 2025 5 mins read

Limit Request Rate by Custom Keys in OpenResty Edge

tutorial openresty-edge proxy rate-limit dos-attacks

Add request rate limiting page rule for the sample application
Test
Limit the rate of SSL handshakes

Add request rate limiting page rule for the sample application
Test
Limit the rate of SSL handshakes

OpenResty XRay Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 14 mins read

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 4 of 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

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 Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 10 mins read

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 3 of 4)

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

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 Jun 17, 2025

OpenResty XRay Updated Jun 17, 2025 14 mins read