Buffers and Memory

In-Memory Buffers

Factory Functions

allocate_buffer(int64_t size, …[, resizable])	Allocate a mutable buffer.
py_buffer(obj)	Construct an Arrow buffer from a Python bytes-like or buffer-like object
foreign_buffer(address, size[, base])	Construct an Arrow buffer with the given address and size.

Classes

Buffer()	The base class for all Arrow buffers.
ResizableBuffer	A base class for buffers that can be resized.

Miscellaneous

compress(buf[, codec, asbytes, memory_pool])	Compress data from buffer-like object.
decompress(buf[, decompressed_size, codec, …])	Decompress data from buffer-like object.

Memory Pools

MemoryPool()	Base class for memory allocation.
default_memory_pool()	Return the process-global memory pool.
jemalloc_memory_pool()	Return a memory pool based on the jemalloc heap.
mimalloc_memory_pool()	Return a memory pool based on the mimalloc heap.
system_memory_pool()	Return a memory pool based on the C malloc heap.
jemalloc_set_decay_ms(decay_ms)	Set arenas.dirty_decay_ms and arenas.muzzy_decay_ms to indicated number of milliseconds.
set_memory_pool(MemoryPool pool)
log_memory_allocations([enable])	Enable or disable memory allocator logging for debugging purposes
total_allocated_bytes()	Return the currently allocated bytes from the default memory pool.