Memory

OpenResty XRay Feb 18, 2025

OpenResty XRay Updated Feb 18, 2025 9 mins read

Analyzing CPU, off-CPU and Disk I/O Usage of Java Applications (Using OpenResty XRay)

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

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 May 11, 2024

OpenResty XRay Updated May 11, 2024 5 mins read

Locate Large Memory Objects inside PHP 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

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 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

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 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

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 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

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 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

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 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

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

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

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

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

OpenResty Open Source May 30, 2025

OpenResty 1.27.1.2 Released

Version highlights
Full Changelog
Feedback

OpenResty XRay May 30, 2025

Deep Dive into Dynamic Tracing Technology: How OpenResty XRay Revolutionizes Problem Diagnosis

Dynamic Tracing: A Powerful Tool for Solving Complex System Issues
Why Choose OpenResty XRay?
Product Focus: XRay Applications in Real-World Scenarios
Common Misconceptions and FAQs: What You Might Want to Know About Dynamic Tracing

OpenResty XRay May 26, 2025

Why is Dynamic Tracing Difficult to Implement? How Does OpenResty XRay Break Through?

Why is Problem Troubleshooting Becoming Increasingly Difficult in Modern Software Architecture?
Trend Insights: The Future of Observability Technology
How Does Dynamic Tracing Technology Break Through Abstraction Layers?
Use Case: Real-time Statistics of Plugin Resource Consumption in Production Kong Services
Conclusion

OpenResty XRay May 26, 2025

Traditional Methods vs. Dynamic Tracing: A Revolution in Efficiency and Control

A Revolution in Efficiency and Control
Dynamic Tracing: X-Ray Vision for Your Systems
From Flame Graphs to System Panorama
Why Choose OpenResty XRay?
The Future of Observability: New Frontiers in Dynamic Tracing

OpenResty XRay May 26, 2025

The Next Stop for Observability: How OpenResty XRay Redefines Problem Troubleshooting

Why is Problem Troubleshooting Becoming Increasingly Difficult in Modern Software Architecture?
Trend Insights: The Future of Observability Technology
How Does Dynamic Tracing Technology Break Through Abstraction Layers?
Use Case: Real-time Statistics of Plugin Resource Consumption in Production Kong Services
Conclusion

OpenResty Blog

OpenResty's Official Blog for Technologies & Products

Analyzing CPU, off-CPU and Disk I/O Usage of Java Applications (Using OpenResty XRay)

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

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

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

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

Memory and CPU usage statistics among Kong plugins online (using OpenResty XRay)

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

The LuaJIT GC64 Mode

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

OpenResty 1.27.1.2 Released

Deep Dive into Dynamic Tracing Technology: How OpenResty XRay Revolutionizes Problem Diagnosis

Why is Dynamic Tracing Difficult to Implement? How Does OpenResty XRay Break Through?

Traditional Methods vs. Dynamic Tracing: A Revolution in Efficiency and Control

The Next Stop for Observability: How OpenResty XRay Redefines Problem Troubleshooting

Analyzing CPU, off-CPU and Disk I/O Usage of Java Applications (Using OpenResty XRay)

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

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

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

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

Memory and CPU usage statistics among Kong plugins online (using OpenResty XRay)

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

The LuaJIT GC64 Mode

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

OpenResty 1.27.1.2 Released

Deep Dive into Dynamic Tracing Technology: How OpenResty XRay Revolutionizes Problem Diagnosis

Why is Dynamic Tracing Difficult to Implement? How Does OpenResty XRay Break Through?

Traditional Methods vs. Dynamic Tracing: A Revolution in Efficiency and Control

The Next Stop for Observability: How OpenResty XRay Redefines Problem Troubleshooting

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