OpenResty's Official Blog for Technologies & Products

OpenResty XRay Jun 26, 2026

OpenResty XRay Updated Jun 26, 2026 4 mins read

Unveiling Python Code Execution with UDB

openresty-xray undo python udb

• The Unique Value of UDB in Python Debugging
• Enhancing Debugging Capabilities with OpenResty XRay
• Real-World Example: Analyzing Python Network Request Call Stacks
• Summary

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 6 mins read

Diagnosing High Disk I/O in Python Applications with XRay

tutorial openresty-xray python disk-io

• Identifying the Python process with high disk I/O
• Tracing Python disk read and write code paths with flame graphs
• Automatic disk I/O analysis and reports
• What is OpenResty XRay
• Frequently Asked Questions

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 3 mins read

Performance Impact of OpenResty XRay when Tracing Python Apps

tutorial openresty-xray python overhead

• What Happens to CPU, Memory, and Load During Profiling?
• How Much Does Profiling Affect Throughput and Latency?
• OpenResty XRay vs. Always-On APM Agents
• FAQ

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 6 mins read

Django Memory Profiler: Analyze Object-Level Memory Usage in a Live App

tutorial openresty-xray python memory django

• Spot a high-memory Django process with ps
• Profile the Django app’s memory usage with Guided Analysis
• Read the flame graph: which Python module uses the most memory
• Monitor Django memory usage automatically with Insights
• What is OpenResty XRay

OpenResty XRay Aug 24, 2026

OpenResty XRay Updated Aug 24, 2026 6 mins read

Python Memory Profiler: Find the Largest Objects Eating RAM Without Code Changes

tutorial openresty-xray python memory

• Find which Python process is using the most memory
• Profile Python memory with guided analysis: find the largest objects and their modules
• Automatically monitor Python memory usage with scheduled reports
• What is OpenResty XRay

OpenResty XRay Aug 14, 2026

OpenResty XRay Updated Aug 14, 2026 6 mins read

Python Process Stuck at 8% CPU: Off-CPU Analysis Traces a Blocking subprocess.run Call

tutorial openresty-xray python off-cpu

• The symptom: Python process CPU usage stays low under heavy requests
• Find the blocking Python code paths with OpenResty XRay’s Guided Analysis
• Automatic analysis and reports in the Insights page
• FAQ
• What is OpenResty XRay
• About The Author