OpenResty XRay Apr 8, 2024

OpenResty XRay Updated Apr 8, 2024 7 mins read

Use C++ to Dynamic-Trace C++ Applications

• Setting Up the Target C++ Program
• Crafting the C++ (or Y++) Analyzer
• Operationalizing the Target and Analyzer
• Advancing Support for Complex C++ Applications
• About the Debug Symbols

OpenResty XRay Apr 1, 2024

OpenResty XRay Updated Apr 1, 2024 6 mins read

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

• Problem: high CPU usage
• Spot the CPU-hottest Erlang code paths
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Apr 1, 2024

OpenResty XRay Updated Apr 1, 2024 5 mins read

How to Trace Exceptions inside Perl Applications (using OpenResty XRay)

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

OpenResty XRay Mar 27, 2024

OpenResty XRay Updated Mar 27, 2024 5 mins read

Analyze OpenResty/Nginx Applications without Debug Symbols (using OpenResty XRay)

• Problem: Debug Symbols are missing
• Automatically Analyze and Rebuild Debug Symbols
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Mar 14, 2024

OpenResty XRay Updated Mar 14, 2024 7 mins read

Automatic Core Dump Analysis (using OpenResty XRay)

• Check the core dump file
• Use the guided analysis feature of OpenResty XRay to analyze the core file
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Mar 11, 2024

OpenResty XRay Updated Mar 11, 2024 4 mins read

Install OpenResty XRay’s Agents on Amazon Linux via Package Bundles

• 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 Mar 14, 2024

OpenResty XRay Updated Mar 14, 2024 6 mins read

Pinpointing the Hottest Go Code Paths with High Disk I/O (using OpenResty XRay)

• Problem: high disk I/O
• Use the guidede analysis feature of OpenResty XRay to spot the problematic Go code paths
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Feb 27, 2024

OpenResty XRay Updated Feb 27, 2024 6 mins read

How CPU Time is Spent inside Envoy Servers (using OpenResty XRay)

• Problem: high CPU usage
• Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive C++ code paths inside Envoy Servers
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Feb 27, 2024

OpenResty XRay Updated Feb 27, 2024 5 mins read

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

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

OpenResty XRay Feb 19, 2024

OpenResty XRay Updated Feb 19, 2024 5 mins read

How to Locate Exceptions inside Go Applications (using OpenResty XRay)

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

OpenResty XRay Feb 1, 2024

OpenResty XRay Updated Feb 1, 2024 6 mins read

How CPU Time is Spent inside PHP Laravel Apps (using OpenResty XRay)

• Problem: high CPU usage
• Use the Guidede Analysis Feature of OpenResty XRay to Analyze CPU Distribution in Laravel Application
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Feb 29, 2024

OpenResty XRay Updated Feb 29, 2024 6 mins read

Find Blocking Perl Code Paths Holding back CPU Usage (Using OpenResty XRay)

• Problem: low CPU usage
• Use the guided analysis feature of OpenResty XRay to spot the blocking Perl code paths
• Automatic analysis and reports
• What is OpenResty XRay
• About The Author

OpenResty XRay Jan 22, 2024

OpenResty XRay Updated Jan 22, 2024 4 mins read

How to Locate Exceptions inside Rust Applications (using OpenResty XRay)

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

OpenResty XRay Jan 29, 2024

OpenResty XRay Updated Jan 29, 2024 6 mins read

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

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

OpenResty XRay Dec 29, 2023

OpenResty XRay Updated Dec 29, 2023 6 mins read

How to Diagnose HTTP 504 Timeout Errors using OpenResty XRay

• Problem: HTTP 504 gateway timeout errors
• Use the guidede analysis feature of OpenResty XRay to diagnose these errors
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Feb 1, 2024

OpenResty XRay Updated Feb 1, 2024 5 mins read

How CPU Time is Spent inside Go’s CockroachDB (using OpenResty XRay)

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

OpenResty XRay Feb 1, 2024

OpenResty XRay Updated Feb 1, 2024 5 mins read

Performance Overhead of OpenResty XRay when Tracing Perl Apps

• Process Performance Before Running Analysis
• Performance Impact When the Analyzer is Running
• Impact Measurement on Throughput and Latency
• What is OpenResty XRay

OpenResty XRay Feb 1, 2024

OpenResty XRay Updated Feb 1, 2024 5 mins read

Locate Large Memory Objects inside Perl Processes (using OpenResty XRay)

• Problem: high memory usage
• Use the guided analysis feature of OpenResty XRay to find the largest Perl objects or values taking the most RAM
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Dec 18, 2023

OpenResty XRay Updated Dec 18, 2023 5 mins read

Performance Overhead of OpenResty XRay when Tracing Go Apps

• Process Performance Before Running Analysis
• Performance Impact When the Analyzer is Running
• Impact Measurement on Throughput and Latency
• What is OpenResty XRay

OpenResty XRay Dec 5, 2023

OpenResty XRay Updated Dec 5, 2023 5 mins read

Install OpenResty XRay’s Agents on Ubuntu via Deb Packages

• Logging in to the Console
• Installing the Agent via Deb Packages
• Checking the Agent Status and Logs
• Configuring and Detecting Applications
• Initiating Analyzers and Viewing Insights
• Install Another Agent
• What is OpenResty XRay

OpenResty XRay Dec 1, 2023

OpenResty XRay Updated Dec 1, 2023 5 mins read

Performance Impact of OpenResty XRay when Tracing PHP Apps (using OpenResty XRay)

• Process Performance Before Running Analysis
• Performance Impact When the Analyzer is Running
• Impact Measurement on Throughput and Latency
• What is OpenResty XRay

OpenResty XRay Dec 1, 2023

OpenResty XRay Updated Dec 1, 2023 5 mins read

Performance Impact of OpenResty XRay when Tracing Python Apps (using OpenResty XRay)

• Process Performance Before Running Analysis
• Performance Impact When the Analyzer is Running
• Impact Measurement on Throughput and Latency
• What is OpenResty XRay

OpenResty XRay Dec 1, 2023

OpenResty XRay Updated Dec 1, 2023 5 mins read

Performance Impact of OpenResty XRay when Tracing Rust Apps (using OpenResty XRay)

• Process Performance Before Running Analysis
• Performance Impact When the Analyzer is Running
• Impact Measurement on Throughput and Latency
• What is OpenResty XRay

OpenResty XRay Jan 14, 2024

OpenResty XRay Updated Jan 14, 2024 4 mins read

Dynamic-Tracing Custom Go Programs with Custom Ylang Analyzers (using OpenResty XRay)

• Insert two key-value Pairs into a Go Variable
• Write a Customize Ylang Analyzer to Dynamically Trace the Go program
• Test the Results
• What is OpenResty XRay

OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 6 mins read

How Python Django's Application Uses Memory Internally (Using OpenResty XRay)

• Problem: high memory usage
• Use the guidede analysis feature of OpenResty XRay to analyze the django application
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Dec 1, 2023

OpenResty XRay Updated Dec 1, 2023 4 mins read

Install OpenResty XRay’s Agents on CentOS via RPM Packages

• Logging in to the Console
• Installing the Agent via RPM Packages
• Checking the Agent Status and Logs
• Configuring and Detecting Applications
• Initiating Analyzers and Viewing Insights
• Install Another Agent
• What is OpenResty XRay

OpenResty XRay Dec 15, 2023

OpenResty XRay Updated Dec 15, 2023 5 mins read

Find the largest Python objects or values taking the most RAM (using OpenResty XRay)

• Problem: high memory usage
• Use the guided analysis feature of OpenResty XRay to find the largest Python objects or values taking the most RAM
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Nov 20, 2023

OpenResty XRay Updated Nov 20, 2023 6 mins read

How CPU time is spent inside Rust’s Sled library (using OpenResty XRay)

• Problem: high CPU usage
• Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive Rust code paths
• Automatic analysis and reports
• What is OpenResty XRay

OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 6 mins read

How CPU time is spent inside Go's etcd server (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 6 mins read

How CPU time is spent inside llama.cpp + LLaMA2 (using OpenResty XRay)

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

OpenResty XRay Nov 1, 2023

OpenResty XRay Updated Nov 1, 2023 5 mins read

Find Blocking Go Code Paths Holding back CPU Usage (Using OpenResty XRay)

• Problem: low CPU usage
• Use the guidede analysis feature of OpenResty XRay to spot the blocking 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 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