OpenResty XRay Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約11分

Analyzing the Most CPU-Consuming Requests in OpenResty or Nginx

• 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

OpenResty XRay Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約14分

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 4 of 4)

• Transparent Container Tracing
• Efficient Stack Unwinding
• Analyzing Dead Processes (Core Dumps)
• Very Low Tracing Overhead
• Standard Ylang Libraries & Tools
• Network Filtering & Control
• The Ylang Compiler’s Implementation
• Operating System Support
• Contributions to Open-Source Communities

OpenResty XRay Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約10分

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 3 of 4)

• The Language Syntax (Continued)
  • String Literals
  • Built-in Regex Support
  • Full Control-Flow Support
  • Floating-Point Number Support
  • Compared to Open-Source Toolchains
• Transparent Debug Symbol Handling
  • Debug Symbols: No Runtime Overhead
  • Centralized Package Database
  • Fuzzy Matching Debug Symbols

OpenResty XRay Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約14分

Ylang: Universal Language for eBPF, Stap+, GDB, and More (Part 2 of 4)

• The Language Syntax (Continued)
  • Macros with Extensions
  • Tracer and Tracee Spaces
  • Probes
  • Extended Variable Types

OpenResty XRay Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約14分

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 Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約19分

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 Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約10分

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 Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約13分

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 Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約11分

How OpenResty and Nginx Allocate and Manage Memory

• On The System Level
• On The Application Level
• For Traditional Nginx Servers

OpenResty XRay Nov 8, 2024

OpenResty XRay 更新日 Nov 8, 2024 読了時間 約16分

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