← Back

New FAQ Doc for OpenResty XRay

Yichun Zhang Posted Feb 7, 2023 Updated Feb 7, 2023

1 min read

Views

We recently prepared a new FAQ document for our OpenResty XRay product on our website:

https://openresty.com/en/xray/faq/

It summaries true frequently-asked questions from our users over the years.

If you have even more questions, feel free to contact us by sending emails to info@openresty.com. Thank you!

Try out OpenResty XRay for free today

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 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

OpenResty XRay Mar 30, 2024

How to Trace Exceptions inside Perl Applications (using OpenResty XRay)

How to detect and analyze exceptions inside Perl applications
Automatic analysis and reports
What is OpenResty XRay

OpenResty XRay Mar 27, 2024

Analyze OpenResty/Nginx Applications without Debug Symbols (using OpenResty XRay)

Problem: Debug Symbols are missing
Automatically Analyze and Rebuild Debug Symbols
Automatic analysis and reports
What is OpenResty XRay

OpenResty XRay Dec 29, 2023

How to Diagnose HTTP 504 Timeout Errors using OpenResty XRay

Problem: HTTP 504 gateway timeout errors
Use the guidede analysis feature of OpenResty XRay to diagnose these errors
Automatic analysis and reports
What is OpenResty XRay

OpenResty XRay Dec 25, 2023

How CPU Time is Spent inside Go’s CockroachDB (using OpenResty XRay)

Problem: high CPU usage
Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive Go code paths
Automatic analysis and reports
What is OpenResty XRay

OpenResty XRay Dec 25, 2023

Performance Overhead of OpenResty XRay when Tracing Perl Apps

Process Performance Before Running Analysis
Performance Impact When the Analyzer is Running
Impact Measurement on Throughput and Latency
What is OpenResty XRay

OpenResty XRay Dec 15, 2023

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

OpenResty XRay Dec 7, 2023

Performance Overhead of OpenResty XRay when Tracing Go Apps

Process Performance Before Running Analysis
Performance Impact When the Analyzer is Running
Impact Measurement on Throughput and Latency
What is OpenResty XRay

Related Articles

How to Diagnose HTTP 504 Timeout Errors using OpenResty XRay

How CPU Time is Spent inside Go’s CockroachDB (using OpenResty XRay)

Performance Overhead of OpenResty XRay when Tracing Perl Apps

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

Performance Overhead of OpenResty XRay when Tracing Go Apps

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

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)

How to Trace Exceptions inside Perl Applications (using OpenResty XRay)

Analyze OpenResty/Nginx Applications without Debug Symbols (using OpenResty XRay)

How to Diagnose HTTP 504 Timeout Errors using OpenResty XRay

How CPU Time is Spent inside Go’s CockroachDB (using OpenResty XRay)

Performance Overhead of OpenResty XRay when Tracing Perl Apps

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

Performance Overhead of OpenResty XRay when Tracing Go Apps

Love to hear from you, Get in touch 👋

Message was sent successfully!