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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

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

OpenResty XRay Jan 14, 2023

Automatic Analysis Reports in OpenResty XRay

The Past
The Present
The Future

OpenResty XRay Nov 12, 2021

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 1 of 4)

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

Introduction to Lua-Land CPU Flame Graphs

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

Memory Fragmentation in OpenResty and Nginx's Shared Memory Zones

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

How OpenResty and Nginx Shared Memory Zones Consume RAM

Slabs and pages
What is allocated is not what is paid for
Fake Memory Leaks
HUP reload

OpenResty XRay Jan 21, 2020

How OpenResty and Nginx Allocate and Manage Memory

On The System Level
On The Application Level
For Traditional Nginx Servers

OpenResety Edge May 8, 2024

Enable Automatic Healthcheck for Gateway Servers in OpenResty Edge

Create a new page rule
Enable the healthcheck for gateway server
Test the result
What is OpenResty Edge

OpenResety Edge Apr 28, 2024

How to Use Gateway Partitions in OpenResty Edge

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

Accurately Restore the Real Client IP Address in OpenResty Edge

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

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

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

2024 May

Enable Automatic Healthcheck for Gateway Servers in OpenResty Edge May 8, 2024

2024 Apr

2024 Mar

2024 Feb

2024 Jan

2023 Dec

2023 Nov

2023 Oct

2023 Sep

2023 Aug

2023 Jul

2023 Jun

2023 May

2023 Apr

2023 Feb

2023 Jan

Automatic Analysis Reports in OpenResty XRay January 14, 2023

2022 Aug

Resolving Bilibili’s major site incident with OpenResty XRay August 24, 2022

2022 Jul

Tracing the Slowest PCRE Regular Expressions in OpenResty or Nginx Processes July 14, 2022

2022 Jun

2022 Mar

Limit Request Rate by Custom Keys in OpenResty Edge March 1, 2022

2021 Dec

2021 Nov

2021 Oct

Gateway Config's Version Control & Release Management in OpenResty Edge October 19, 2021

2021 Sep

2021 Aug

OpenResty 1.19.9.1 released August 22, 2021

2021 Jun

2021 May

2021 Apr

2021 Mar

2021 Feb

2020 Dec

2020 Nov

2020 Aug

2020 Jul

OpenResty 1.17.8.1 released July 8, 2020

2020 Jun

2020 Mar

OpenResty 1.15.8.3 + OpenResty 1.17.8.1 RC1 released March 21, 2020

2020 Jan

How OpenResty and Nginx Allocate and Manage Memory January 21, 2020

2019 Aug

Join Us August 5, 2019

2019 Jan

The LuaJIT GC64 Mode January 7, 2019

OpenResty Blog

OpenResty's Official Blog for Technologies & Products

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

Automatic Analysis Reports in OpenResty XRay

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 1 of 4)

Introduction to Lua-Land CPU Flame Graphs

Memory Fragmentation in OpenResty and Nginx's Shared Memory Zones

How OpenResty and Nginx Shared Memory Zones Consume RAM

How OpenResty and Nginx Allocate and Manage Memory

Enable Automatic Healthcheck for Gateway Servers in OpenResty Edge

How to Use Gateway Partitions in OpenResty Edge

Accurately Restore the Real Client IP Address in OpenResty Edge

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

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

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

Automatic Analysis Reports in OpenResty XRay

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 1 of 4)

Introduction to Lua-Land CPU Flame Graphs

Memory Fragmentation in OpenResty and Nginx's Shared Memory Zones

How OpenResty and Nginx Shared Memory Zones Consume RAM

How OpenResty and Nginx Allocate and Manage Memory

Enable Automatic Healthcheck for Gateway Servers in OpenResty Edge

How to Use Gateway Partitions in OpenResty Edge

Accurately Restore the Real Client IP Address in OpenResty Edge

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

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

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