Buffer Pool Extension (SSD Bellek Uzantısı)

An architecture that integrates fast non-volatile solid-state storage (SSD) as an auxiliary Level 2 cache extension for the in-memory Buffer Pool.

Internal Architecture Breakdown

Buffer Pool Extension extends the buffer pool with an SSD-backed L2 cache layer for clean data pages, preventing random reads from mechanical storage under heavy read workloads when physical RAM cannot be expanded.

Dirty pages are strictly handled in RAM. Because flash storage is orders of magnitude slower than DRAM, BPE serves as an interim mitigation rather than a permanent replacement for adequate memory sizing.

Production Inspection Queries

SQL Server

SELECT path, state_desc, current_size_in_kb / 1024 AS size_mb FROM sys.dm_os_buffer_pool_extension_configuration;

Back to Glossary