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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
Photo by Yichun Zhang
  • The Problem
  • The Analsysis Process
  • Fully-automated analysis
  • What is OpenResty XRay
xray request demo
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OpenResty XRay Jan 14, 2023

OpenResty XRay Jan 14, 2023

Automatic Analysis Reports in OpenResty XRay
Photo by Yichun Zhang
  • The Past
  • The Present
  • The Future

OpenResty XRay Nov 12, 2021

OpenResty XRay Nov 12, 2021

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 1 of 4)
Photo by Yichun Zhang
  • What is Dynamic Tracing
  • Why the “Y” Name
  • Getting Started
  • Various Backends and Runtimes
  • Why a Unified Frontend Language
  • The Language Syntax

OpenResty XRay Aug 31, 2020

OpenResty XRay Aug 31, 2020

Introduction to Lua-Land CPU Flame Graphs
Photo by Guido Jansen
  • What is a Flame Graph
  • Simple Lua samples
  • Complicated Lua applications
  • Sampling overhead
  • Safety
  • Compatibility
  • Other types of Lua-land Flame Graphs

OpenResty XRay Aug 10, 2020

OpenResty XRay Aug 10, 2020

Memory Fragmentation in OpenResty and Nginx's Shared Memory Zones
Photo by Elena Mozhvilo
  • An empty zone
  • Filling entries of similar sizes
  • Deleting odd-numbered keys
  • Deleting the keys in the first half
  • Mitigating Fragmentation

OpenResty XRay Aug 4, 2020

OpenResty XRay Aug 4, 2020

How OpenResty and Nginx Shared Memory Zones Consume RAM
Photo by Jose G. Ortega Castro
  • Slabs and pages
  • What is allocated is not what is paid for
  • Fake Memory Leaks
  • HUP reload

OpenResty XRay Jan 21, 2020

OpenResty XRay Jan 21, 2020

How OpenResty and Nginx Allocate and Manage Memory
Photo by Harrison Broadbent
  • On The System Level
  • On The Application Level
  • For Traditional Nginx Servers
Latest Articles

OpenResety Edge May 8, 2024

OpenResety Edge May 8, 2024

Enable Automatic Healthcheck for Gateway Servers in OpenResty Edge
Photo by Yichun Zhang
  • Create a new page rule
  • Enable the healthcheck for gateway server
  • Test the result
  • What is OpenResty Edge

OpenResety Edge Apr 28, 2024

OpenResety Edge Apr 28, 2024

How to Use Gateway Partitions in OpenResty Edge
Photo by Yichun Zhang
  • Create a new partition
  • Create a new application in the new partition
  • Create a new page rule
  • Test the new partition
  • What is OpenResty Edge

OpenResety Edge Apr 10, 2024

OpenResety Edge Apr 10, 2024

Accurately Restore the Real Client IP Address in OpenResty Edge
Photo by Yichun Zhang
  • Set “Trusted hosts to set real IP” and “Real IP from” Globally
  • Configure the Application to Output the Client Address
  • Check the Client Address Received on OpenResty Edge
  • What is OpenResty Edge

OpenResty XRay Apr 4, 2024

OpenResty XRay Apr 4, 2024

Use C++ to Dynamic-Trace C++ Applications
Photo by Yichun Zhang
  • 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 Apr 1, 2024

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