OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 5 mins read

Pinpointing the hottest Go code paths with high CPU usage (using OpenResty XRay)

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

OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 5 mins read

Pinpointing the blocking Python code paths (using OpenResty XRay)

• Problem: low CPU usage
• Use the guidede analysis feature of OpenResty XRay to spot the blocking Python code paths
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Aug 15, 2023

OpenResty XRay Updated Aug 15, 2023 5 mins read

Two bugs in Linux kernels' tracing subsystem (found by OpenResty XRay)

• Kernel deadlocks in user-space memory reading
• Data races in x86 breakpoint insertion of the kernel
• What is OpenResty XRay

OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 5 mins read

Pinpointing hottest Perl code paths (using OpenResty XRay)

• Problem: high CPU usage
• Use the guidede analysis feature of OpenResty XRay to spot the hottest Perl code paths
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 5 mins read

Pinpointing hottest Lua code paths in online OpenResty/Nginx servers (using OpenResty XRay)

• Problem: high CPU usage
• Use the guidede analysis feature of OpenResty XRay to spot the hottest Lua code paths
• Automatic analysis and reports

OpenResty XRay Aug 28, 2023

OpenResty XRay Updated Aug 28, 2023 5 mins read

How we solved a CPU bottleneck caused by Lua exceptions in a custom Kong plugin (using OpenResty XRay)

• The problem: high CPU usage in Kong servers
• The analysis & report
• The result: improved performance and reduced CPU usage

OpenResty XRay Jul 15, 2023

OpenResty XRay Updated Jul 15, 2023 7 mins read

Memory and CPU usage statistics among Kong plugins online (using OpenResty XRay)

• CPU usage among all Kong plugins in a server process
• Memory usage among all Kong plugins in a server process
• Extra overhead for the servers

OpenResty XRay Aug 29, 2023

OpenResty XRay Updated Aug 29, 2023 5 mins read

Troubleshooting the extra 200-ms request latency online

• The Problem
• The Analsysis Process
• Fully-automated analysis
• What is OpenResty XRay

OpenResty XRay Jul 22, 2023

OpenResty XRay Updated Jul 22, 2023 6 mins read

Pinpointing leaked Lua tables with OpenResty XRay's command-line tools

• How LuaJIT manages memory
• OpenResty XRay’s command-line tools
• An leaking example
• Analysis procedure
• lj-gco-ref analyzer
• Fully-automated analysis

OpenResty XRay Jul 22, 2023

OpenResty XRay Updated Jul 22, 2023 8 mins read

Real-Time Request Counting against Nginx Processes via YSQL

• How to install the run-ysql tool
• Count total requests served in real time
• Filter out specific requests
• Using YSQL in the Web Console
• True non-invasive tracing

OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 6 mins read

How to deploy the on-premises version of OpenResty XRay on Microsoft's Azure cloud

• Create a subscription and a resource group
• Create the Azure Kubernetes service
• Prepare the environment variables
• Log in to Azure from the command line
• Create the namespace and secret for Kubernetes
• Create the Azure Disk
• Update the configuration file for the persistent volume
• Update the Kubernetes configuration file
• Create the persistent volume
• Deploy the Kubernetes service
• Configure the application gateway

OpenResty XRay Aug 28, 2023

OpenResty XRay Updated Aug 28, 2023 6 mins read

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

• The Problem
• Analyses
• Solutions
• Results

OpenResty XRay Apr 10, 2024

OpenResty XRay Updated Apr 10, 2024 26 mins read

The Wonderland of Dynamic Tracing (Part 1 of 3)

• Dynamic Tracing
• What It Is
• Too Good to be True?
• How it Works
• Still Having Doubts?
• The Advantages of Dynamic Tracing
• DTrace
• SystemTap
• DTrace and SystemTap
• Applications of SystemTap in Production

OpenResty XRay Apr 10, 2024

OpenResty XRay Updated Apr 10, 2024 15 mins read

The Wonderland of Dynamic Tracing (Part 2 of 3)

• Flame Graphs
• Methodology
• Knowledge Is Power
• Open-Source and Debug Symbols

OpenResty XRay Apr 10, 2024

OpenResty XRay Updated Apr 10, 2024 7 mins read

The Wonderland of Dynamic Tracing (Part 3 of 3)

• Dynamic Tracing Support in Linux Kernels
• Hardware Tracing
• Analyze Remains of Dead Process
• Traditional Debugging Technologies
• A Messy World of Debugging
• OpenResty XRay

OpenResty XRay Dec 28, 2022

OpenResty XRay Updated Dec 28, 2022 8 mins read

Optimize Memory Fragmentation due to Huge Nginx Configuration

• Challenges
• Analyses
• Solutions
• Results

OpenResty XRay Feb 7, 2023

OpenResty XRay Updated Feb 7, 2023 1 min read

New FAQ Doc for OpenResty XRay

We recently prepared a new FAQ document for OpenResty XRay

OpenResty XRay Aug 28, 2023

OpenResty XRay Updated Aug 28, 2023 10 mins read

Automatic Analysis Reports in OpenResty XRay

• The Past
• The Present
• The Future

OpenResty XRay Apr 10, 2024

OpenResty XRay Updated Apr 10, 2024 6 mins read

Resolving Bilibili’s major site incident with OpenResty XRay

• The incident
• Process of resolution
• Hardening after the incident
• OpenResty XRay Services

OpenResty XRay Jun 28, 2023

OpenResty XRay Updated Jun 28, 2023 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