Measure Disk I/O Performance per Database File
Jul 3, 2026 / · 8 min read · sql server sys.dm_io_virtual_file_stats sys.master_files disk io io stall disk latency performance database files dmv monitoring scripts ·I/O latency is where disk bottlenecks hide. SQL Server accumulates every millisecond of file-level read and write wait in sys.dm_io_virtual_file_stats — one row per database file, reset at each service restart. Joining that DMV to sys.master_files replaces raw file IDs with physical paths and file types, and dividing …
Read More