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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
Photo by Yichun Zhang
  • Kernel deadlocks in user-space memory reading
  • Data races in x86 breakpoint insertion of the kernel
  • What is OpenResty XRay
xray request demo
Trending

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

OpenResty XRay Sep 20, 2024

OpenResty XRay Sep 20, 2024

Analyzing CPU, off-CPU and Disk I/O Usage of Java Applications (Using OpenResty XRay)
Photo by Yichun Zhang
  • High CPU usage issues in Java applications
  • CPU blocking issues in Java applications
  • High disk I/O issues in Java applications
  • Supported Java versions and operating systems
  • Performance impact and overhead
  • Future plans

OpenResty XRay Sep 5, 2024

OpenResty XRay Sep 5, 2024

A Quick Tour to OpenResty’s Web Console
A Quick Tour to OpenResty’s Web Console
  • Introduction to Insight Page
  • Comprehensive Report Details
  • Dashboard Overview
  • Use Guided Analysis Feature to Analyze Online
  • Setting and Configuration
  • What is OpenResty XRay

OpenResty XRay Aug 12, 2024

OpenResty XRay Aug 12, 2024

Pinpointing the Python Code Paths with High Disk I/O (using OpenResty XRay)
Pinpointing the Python Code Paths with High Disk I/O (using OpenResty XRay)
  • Problem: high disk I/O
  • Spot the problematic Python code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Aug 4, 2024

OpenResty XRay Aug 4, 2024

How to Trace Exceptions inside PHP Applications (using OpenResty XRay)
How to Trace Exceptions inside PHP Applications (using OpenResty XRay)
  • How to detect and analyze exceptions inside PHP applications
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jul 26, 2024

OpenResty XRay Jul 26, 2024

Install OpenResty XRay’s Agents on Kubernetes cluster
Install OpenResty XRay’s Agents on Kubernetes cluster
  • Logging in to the Console
  • Installing the Agent on Kubernetes cluster
  • Configuring and Detecting Applications
  • Initiating Analyzers and Viewing Insights
  • Install Another Agent
  • What is OpenResty XRay
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