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OpenResty XRay Aug 19, 2026

OpenResty XRay Updated Aug 19, 2026 9 mins read

How We Pinpointed a 244ms Latency Spike in a 500k QPS OpenResty Gateway

openresty-xray qps p99 cpu
  • Latency Spikes and CPU Waste Hidden Beneath Healthy Averages
  • Troubleshooting OpenResty Latency Without Code Changes or Restarts
  • The Results: Latency Spikes Eliminated, 30% Lower CPU Usage
  • Frequently Asked Questions
  • Latency Spikes and CPU Waste Hidden Beneath Healthy Averages
  • Troubleshooting OpenResty Latency Without Code Changes or Restarts
  • The Results: Latency Spikes Eliminated, 30% Lower CPU Usage
  • Frequently Asked Questions

OpenResty XRay Aug 19, 2026

OpenResty XRay Updated Aug 19, 2026 9 mins read

Gzip CPU Usage: Why Compression Level 6 Consumed 54% of Server CPU

casestudy openresty-xray gzip cpu
  • How Gzip Compression Consumed 54% of CPU in Production
  • Why Gzip CPU Usage Was So High: A Configuration-Level Diagnosis
  • Quantifying Gzip and Brotli CPU Overhead
  • From Guesswork to Data-Driven Compression Tuning
  • How Gzip Compression Consumed 54% of CPU in Production
  • Why Gzip CPU Usage Was So High: A Configuration-Level Diagnosis
  • Quantifying Gzip and Brotli CPU Overhead
  • From Guesswork to Data-Driven Compression Tuning

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 8 mins read

Analyzing CPU Usage in Online Node.js Applications (Using OpenResty XRay)

openresty-xray Node.js memory cpu
  • High CPU Usage Issues in Node.js Applications
  • CPU Blocking Issues in Node.js Applications
  • Automated Sampling and Expert Analysis
  • Performance Impact and Overhead
  • Future Plans
  • High CPU Usage Issues in Node.js Applications
  • CPU Blocking Issues in Node.js Applications
  • Automated Sampling and Expert Analysis
  • Performance Impact and Overhead
  • Future Plans

OpenResty XRay Jul 22, 2026

OpenResty XRay Updated Jul 22, 2026 10 mins read

Java Application Profiling: CPU, Off-CPU & Disk I/O Without Safepoint Bias

openresty-xray java memory cpu
  • Profiling Java CPU hotspots with flame graphs
  • Off-CPU Java profiling: lock contention and blocking analysis
  • Java disk I/O profiling: tracing file and socket writes
  • OpenJDK 8/11/17/21 application profiling support
  • Automated sampling and expert analysis
  • Performance impact and overhead
  • FAQ
Photo by Yichun Zhang
  • Profiling Java CPU hotspots with flame graphs
  • Off-CPU Java profiling: lock contention and blocking analysis
  • Java disk I/O profiling: tracing file and socket writes
  • OpenJDK 8/11/17/21 application profiling support
  • Automated sampling and expert analysis
  • Performance impact and overhead
  • FAQ

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 5 mins read

How CPU Time is Spent inside Envoy Servers (using OpenResty XRay)

tutorial openresty-xray CPU Envoy
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive C++ code paths inside Envoy Servers
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive C++ code paths inside Envoy Servers
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 5 mins read

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

tutorial openresty-xray PHP CPU
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the CPU-hottest PHP code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the CPU-hottest PHP code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 5 mins read

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

tutorial openresty-xray cpu Go CockroachDB
  • 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
  • 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 Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 6 mins read

How CPU time is spent inside Rust’s Sled library (using OpenResty XRay)

tutorial openresty-xray cpu Sled Rust
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive Rust code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the most CPU-intensive Rust code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 6 mins read

How CPU time is spent inside Go's etcd server (using OpenResty XRay)

tutorial openresty-xray go cpu etcd
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the hottest Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the hottest Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Aug 19, 2026

OpenResty XRay Updated Aug 19, 2026 7 mins read

llama.cpp CPU Usage: 400% CPU Traced to ggml Hot Functions

tutorial openresty-xray LLM cpu generative-AI llama2 llama.cpp profiling AI
  • Running llama.cpp and Observing 400% CPU Usage
  • Profiling llama.cpp CPU Usage with OpenResty XRay
  • Findings: The Hottest C++ Code Paths
  • What is OpenResty XRay
  • Running llama.cpp and Observing 400% CPU Usage
  • Profiling llama.cpp CPU Usage with OpenResty XRay
  • Findings: The Hottest C++ Code Paths
  • What is OpenResty XRay

OpenResty XRay Aug 14, 2026

OpenResty XRay Updated Aug 14, 2026 5 mins read

Go Off-CPU Analysis: Tracing a Running Process Stuck at 2% CPU to a Blocking Shell Call

tutorial openresty-xray go cpu
  • The symptom: Go service CPU usage stays low under load
  • Running off-CPU analysis on the live Go process with OpenResty XRay
  • Root cause: a blocking shell command at a single source line
  • Automatic analysis and reports
  • The symptom: Go service CPU usage stays low under load
  • Running off-CPU analysis on the live Go process with OpenResty XRay
  • Root cause: a blocking shell command at a single source line
  • Automatic analysis and reports

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 5 mins read

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

tutorial openresty-xray go cpu
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the hottest Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the hottest Go code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 5 mins read

Pinpointing hottest Perl code paths (using OpenResty XRay)

tutorial openresty-xray perl cpu
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the hottest Perl code paths
  • Automatic analysis and reports
  • What is OpenResty XRay
  • Problem: high CPU usage
  • Use the guidede analysis feature of OpenResty XRay to spot the hottest Perl code paths
  • Automatic analysis and reports
  • What is OpenResty XRay

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 11 mins read

Analyzing the Most CPU-Consuming Requests in OpenResty or Nginx

tutorial cpu nginx openresty-xray ysql
  • System Environment
  • CPU-Hottest Request Hostnames
  • CPU-Hottest Request URIs
  • Digging Deeper
  • Running Directly in the Web Console
  • Tracing Applications inside Containers
  • How The Tools are Implemented
  • The Overhead of the Tools
Photo by Yichun Zhang
  • System Environment
  • CPU-Hottest Request Hostnames
  • CPU-Hottest Request URIs
  • Digging Deeper
  • Running Directly in the Web Console
  • Tracing Applications inside Containers
  • How The Tools are Implemented
  • The Overhead of the Tools
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