python|python 内存管理

2021-09-10

python 内存接口分层图 Raw memory interface -> memory interface (pymalloc allocator) -> object allocators
The pymalloc allocator Python has a pymalloc allocator optimized for small objects (smaller or equal to 512 bytes) with a short lifetime. It uses memory mappings called “arenas” with a fixed size of 256 KB. It falls back to PyMem_RawMalloc() and PyMem_RawRealloc() for allocations larger than 512 bytes.

大内存分配使用raw memory
小内存使用arenas 内存池管理

Arenas and pools The arena is a chunk of 256kB memory allocated on the heap, which provides memory for 64 pools.

python|python 内存管理

文章图片
屏幕快照 2018-12-04 下午3.19.30.png Allocation statistics

You can get allocations statistics by calling sys._debugmallocstats()
【python|python 内存管理】PYTHONMALLOCSTATS 使用环境变量PYTHONMALLOCSTATS=true

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