Break Down Buffer Pool Memory by Database
Jul 12, 2026 / · 8 min read · sql server sys.dm_os_buffer_descriptors buffer pool data cache memory database memory dmv performance monitoring scripts ·sys.dm_os_buffer_descriptors is the DMV that maps SQL Server's data cache down to the individual page level — one row per 8 KB page currently held in the buffer pool, tagged with the database_id and file_id it belongs to. Rolling those rows up with a simple GROUP BY database_id turns millions of individual page entries …
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