OpenResty XRay Jul 10, 2023

OpenResty XRay Updated Jul 10, 2023 14 mins read

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

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 Apr 10, 2024

OpenResty XRay Updated Apr 10, 2024 19 mins read

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

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 Jul 6, 2023

OpenResty XRay Updated Jul 6, 2023 10 mins read

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

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 Jul 6, 2023

OpenResty XRay Updated Jul 6, 2023 13 mins read

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

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 Apr 10, 2024

OpenResty XRay Updated Apr 10, 2024 11 mins read

How OpenResty and Nginx Allocate and Manage Memory

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

Photo by Harrison Broadbent

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

OpenResty XRay Apr 10, 2024

OpenResty XRay Updated Apr 10, 2024 16 mins read

The LuaJIT GC64 Mode

The Old Memory Limit
- When Hitting The Memory Limit
- The Memory Limit Is Per Process
- GC-Managed Memory
- Memory Allocated Outside GC
- Extending The x64 Mode to The 4 GB Limit
The New GC64 Mode
- How to Enable The GC64 Mode
- Performance Impact
- Debugging and Profiling Tool Chains

The Old Memory Limit
- When Hitting The Memory Limit
- The Memory Limit Is Per Process
- GC-Managed Memory
- Memory Allocated Outside GC
- Extending The x64 Mode to The 4 GB Limit
The New GC64 Mode
- How to Enable The GC64 Mode
- Performance Impact
- Debugging and Profiling Tool Chains

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2
3
4

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

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

OpenResety Edge Jun 27, 2024

OpenResety Edge Jun 27, 2024

How to Automate Managing Gateway Servers in K8s Environment (using OpenResty Edge)

Photo by Yichun Zhang

Bind a Kubernetes to a gateway cluster
Test the result
What is OpenResty Edge

OpenResety Edge Jun 26, 2024

OpenResety Edge Jun 26, 2024

Use Lua Extensions to Respond to Gateway Server Offline Events in OpenResty Edge

Photo by Yichun Zhang

Create a new Lua extension
Trigger the Lua extension with an offline gateway server
What is OpenResty Edge

OpenResty XRay May 24, 2024

OpenResty XRay May 24, 2024

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

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

Problem: high disk I/O
Spot the problematic Rust code paths
Automatic analysis and reports
What is OpenResty XRay

OpenResty XRay May 12, 2024

OpenResty XRay May 12, 2024

Introduction to OpenResty XRay Mobile Apps

Introduction to OpenResty XRay Mobile Apps

Download and install OpenResty XRay for Android
Sign into OpenResty XRay
Automatic analysis report
View the performance chart data on the dashboard page
Guided analysis feature
What is OpenResty XRay

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