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ON f.database_id=v.database_id and f.file_id=v.file_id INNER JOIN sys.dm_io_virtual_file_stats(NULL, NULL) v SUM(v.size_on_disk_bytes) AS total_size_on_disk_bytes SUM(v.num_of_bytes_read) AS total_num_of_bytes_read, SUM(v.num_of_reads) AS total_num_of_reads, SUM(v.num_of_bytes_written) AS total_num_of_bytes_written, SUM(v.num_of_writes) AS total_num_of_writes,

GROUP BY name ORDER BY 'Number of Read' DESC įor Displaying I/O statistics by physical drive letter : SELECT left(f.physical_name, 1) AS DriveLetter,ĭATEADD(MS,sample_ms * -1, GETDATE()) AS , ,SUM(num_of_writes) AS 'Number of Writes'įROM sys.dm_io_virtual_file_stats(NULL, NULL) I Irerspective of any isolation level, you can identify total I/O for each database SELECT name AS 'Database Name' You can use this script to find out read/writes by database. Read/Writes will eventually increase in Tempdb when snapshot isolationlevel is turned on.database engine retrieves rowversion from Tempdb.Snapshot Isolation level does not create Temporary tables ,it stores a copy of row in the TempDB.And, in turn efficiency of disk latency is challenging. It is absolutely right about Snap shot isolation level each time a row is updated, the SQL Server Database Engine stores a copy of the original row in tempdb.