Tagged with "memory"

Photo by Elena Mozhvilo

Memory Fragmentation in OpenResty and Nginx's Shared Memory Zones

Aug 10, 2020 9 mins read Posted by Yichun Zhang (updated Jan 2, 2022)

An empty zone
Filling entries of similar sizes
Deleting odd-numbered keys
Deleting the keys in the first half
Mitigating Fragmentation

Photo by Jose G. Ortega Castro

How OpenResty and Nginx Shared Memory Zones Consume RAM

Aug 4, 2020 13 mins read Posted by Yichun Zhang (updated Jan 4, 2022)

Slabs and pages
What is allocated is not what is paid for
Fake Memory Leaks
HUP reload

Photo by Harrison Broadbent

How OpenResty and Nginx Allocate and Manage Memory

Jan 21, 2020 10 mins read Posted by Yichun Zhang (updated Jan 4, 2022)

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

The LuaJIT GC64 Mode

Jan 7, 2019 15 mins read Posted by Yichun Zhang (updated Jan 4, 2022)

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