PostgreSQL Buffer Manager
PostgreSQL buffer manager:
- provides a shared pool of memory buffers for all backends
- all access methods get data from disk via buffer manager
Buffers are located in a large region of shared memory.
Definitions: src/include/storage/buf*.h
Functions: src/backend/storage/buffer/*.c
Commentary: backend/storage/buffer/README
Buffer code is also used by backends who want a private buffer pool
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