OpenResty Official Blog

Featured Articles

dynamic-tracing8 mins read

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

security10 mins read

Binary Vulnerability Scanning: Catch Backported Patches, Cut False Positives

openresty-xray6 mins read

Introduction to OpenResty XRay

openresty-xray4 mins read

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

openresty-xray4 mins read

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

dynamic-tracing26 mins read

The Wonderland of Dynamic Tracing (Part 1 of 3)

nginx13 mins read

How OpenResty and Nginx Shared Memory Zones Consume RAM

nginx13 mins read

Nginx Memory Usage Explained: Where the RAM Actually Goes

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 Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 6 mins read

How to Trace Perl Exceptions in Production Without Restarting

How to detect and analyze exceptions inside Perl applications
Automatic analysis and reports
What is OpenResty XRay
FAQ

How to detect and analyze exceptions inside Perl applications
Automatic analysis and reports
What is OpenResty XRay
FAQ

OpenResty XRay Jul 24, 2026

OpenResty XRay Updated Jul 24, 2026 6 mins read

Nginx 'No Debugging Symbols Found'? Rebuild Them Automatically with OpenResty XRay

tutorial openresty-xray debug-symbol nodwarf

Confirming Nginx Is Stripped and Debug Symbols Are Missing
Rebuild Missing Nginx Debug Symbols Automatically — No Recompile Needed
Continuous Analysis: Daily and Weekly Insights Reports
FAQ: nginx-dbg, recompiling, and profiling stripped binaries

Confirming Nginx Is Stripped and Debug Symbols Are Missing
Rebuild Missing Nginx Debug Symbols Automatically — No Recompile Needed
Continuous Analysis: Daily and Weekly Insights Reports
FAQ: nginx-dbg, recompiling, and profiling stripped binaries

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 7 mins read

Automatic Core Dump Analysis (using OpenResty XRay)

openresty-xray core-dump lua-backtrace luajit dynamic-tracing ebpf

Locate the core dump file from a crashed OpenResty/Nginx worker
Start automatic (guided) core dump analysis in OpenResty XRay
Read the signal, CPU registers, and C backtrace of the crash
Follow the Lua backtrace to the exact crashing line
Automatic Insights reports for online core dumps

Locate the core dump file from a crashed OpenResty/Nginx worker
Start automatic (guided) core dump analysis in OpenResty XRay
Read the signal, CPU registers, and C backtrace of the crash
Follow the Lua backtrace to the exact crashing line
Automatic Insights reports for online core dumps

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 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 Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 6 mins read

Debugging High Disk I/O in Go Services on Linux

tutorial openresty-xray go disk-io

Identifying the Go process with high disk I/O
Tracing Go disk read and write code paths with flame graphs
Automatic disk I/O analysis and reports
What is OpenResty XRay
Frequently Asked Questions

Identifying the Go process with high disk I/O
Tracing Go disk read and write code paths with flame graphs
Automatic disk I/O analysis and reports
What is OpenResty XRay
Frequently Asked Questions

OpenResety Edge Aug 24, 2026

OpenResety Edge Updated Aug 24, 2026 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 Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 6 mins read

Envoy CPU Profiling: Find Hot C++ Paths with Flame Graphs

tutorial openresty-xray cpu envoy flame-graph profiling dynamic-tracing

Scenario: Envoy Proxy Running at 90% CPU
Profile Envoy CPU with C++ Flame Graphs
Continuous CPU Monitoring with Automated Reports
What is OpenResty XRay
FAQ: Envoy CPU Profiling

Scenario: Envoy Proxy Running at 90% CPU
Profile Envoy CPU with C++ Flame Graphs
Continuous CPU Monitoring with Automated Reports
What is OpenResty XRay
FAQ: Envoy CPU Profiling

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 7 mins read

PHP High CPU Usage: Find the Hottest Code Path with OpenResty XRay

tutorial openresty-xray php cpu flame-graph profiling

Problem: high CPU usage
Find which PHP function is using the CPU with OpenResty XRay Guided Analysis
Read the CPU flame graph and the hottest PHP and C code paths
Automatic analysis and reports
What is OpenResty XRay

Problem: high CPU usage
Find which PHP function is using the CPU with OpenResty XRay Guided Analysis
Read the CPU flame graph and the hottest PHP and C code paths
Automatic analysis and reports
What is OpenResty XRay

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 6 mins read

How to Trace Go Panics in Production Without Restarting

tutorial openresty-xray go exceptions

How to detect and analyze exceptions inside live Go applications
Automatic analysis and reports
What is OpenResty XRay
FAQ

How to detect and analyze exceptions inside live Go applications
Automatic analysis and reports
What is OpenResty XRay
FAQ

OpenResety Edge Aug 24, 2026

OpenResety Edge Updated Aug 24, 2026 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 Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 9 mins read

Laravel High CPU Usage: Why Even Hello World Burns Half Its CPU

tutorial openresty-xray laravel php

Why Laravel uses high CPU even in hello world apps
Laravel CPU profiling: the three hottest code paths
Automatic analysis and reports
What is OpenResty XRay

Why Laravel uses high CPU even in hello world apps
Laravel CPU profiling: the three hottest code paths
Automatic analysis and reports
What is OpenResty XRay

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 7 mins read

Perl Process Stuck at 13% CPU: Off-CPU Flame Graphs Pinpoint a Blocking HTTP Call

tutorial openresty-xray perl off-cpu

The symptom: Perl process CPU usage stays low under heavy requests
Find the blocking Perl code paths with OpenResty XRay’s off-CPU flame graphs
Automatic analysis and reports in the Insights page
FAQ
What is OpenResty XRay
About The Author

The symptom: Perl process CPU usage stays low under heavy requests
Find the blocking Perl code paths with OpenResty XRay’s off-CPU flame graphs
Automatic analysis and reports in the Insights page
FAQ
What is OpenResty XRay
About The Author

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 5 mins read

How to Trace Rust Panics in Production Without Restarting

tutorial openresty-xray rust exceptions

How to detect and analyze exceptions inside live Rust applications
Automatic analysis and reports
What is OpenResty XRay
FAQ

How to detect and analyze exceptions inside live Rust applications
Automatic analysis and reports
What is OpenResty XRay
FAQ

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 7 mins read

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

tutorial openresty-xray prometheus garbage-collection go

Problem: high CPU usage
Use the guided 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 guided analysis feature of OpenResty XRay to spot the CPU-hottest Go code paths
Automatic analysis and reports
What is OpenResty XRay

OpenResty Open Source Aug 24, 2026

OpenResty Open Source Updated Aug 24, 2026 1 min read