OpenResty's Official Blog for Technologies & Products

OpenResty XRay Aug 11, 2026

OpenResty XRay Updated Aug 11, 2026 10 mins read

Fix LuaJIT RSS Memory Leak in OpenResty: Stop OOM Kills Without Restarts

memory openresty-xray luajit private-library

• What Is the LuaJIT Pseudo Memory Leak?
• Diagnosing the Problem with Real Production Data
• Why Standard Fixes Don’t Work
• How LuaJIT-plus Fixes This at the Allocator Level
• Production Impact After Deployment

OpenResty XRay Jul 24, 2026

OpenResty XRay Updated Jul 24, 2026 7 mins read

Automatic Core Dump Analysis (using OpenResty XRay)

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• Locate the core dump file from a crashed OpenResty/Nginx worker
• Start automatic (guided) core dump analysis in OpenResty XRay
• Read the signal, CPU registers, and C backtrace of the crash
• Follow the Lua backtrace to the exact crashing line
• Automatic Insights reports for online core dumps

OpenResty Open Source Jul 6, 2026

OpenResty Open Source Updated Jul 6, 2026 7 mins read

LuaJIT Bytecode in OpenResty - How to Precompile Lua Modules

nginx openresty tutorial lua luajit

OpenResty XRay Jul 7, 2026

OpenResty XRay Updated Jul 7, 2026 13 mins read

Nginx Memory Usage Explained: Where the RAM Actually Goes

nginx openresty memory luajit openresty-xray dynamic-tracing

• How to Check Nginx Memory Usage
• On The System Level
• On The Application Level
• For Traditional Nginx Servers
• FAQ: How Much Memory Does Nginx Need?

OpenResty XRay Jul 7, 2026

OpenResty XRay Updated Jul 7, 2026 16 mins read

LuaJIT GC64 Mode: Removing the 2GB Memory Limit

luajit openresty memory openresty-xray

• 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