观察查询对TempDB造成了多少读写

楼主 suPer 于 2014-08-16 09:40:53
观察查询对TempDB造成了多少读写
[CODE]DECLARE @read   BIGINT,
       @write  BIGINT
;        
SELECT  @read = SUM(num_of_bytes_read),
       @write = SUM(num_of_bytes_written)
FROM    tempdb.sys.database_files AS DBF
JOIN    sys.dm_io_virtual_file_stats(2, NULL) AS FS
       ON FS.file_id = DBF.file_id
WHERE   DBF.type_desc = 'ROWS'

--这里放入需要测量的语句

SELECT  tempdb_read_MB = (SUM(num_of_bytes_read) - @read) / 1024. / 1024.,
       tempdb_write_MB = (SUM(num_of_bytes_written) - @write) / 1024. / 1024.,
       internal_use_MB =
           (
           SELECT  internal_objects_alloc_page_count / 128.0
           FROM    sys.dm_db_task_space_usage
           WHERE   session_id = @@SPID
           )
FROM    tempdb.sys.database_files AS DBF
JOIN    sys.dm_io_virtual_file_stats(2, NULL) AS FS
       ON FS.file_id = DBF.file_id
WHERE   DBF.type_desc = 'ROWS'[/CODE]
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1楼 Xinsoft 于 2014-08-16 11:23:41
挺实用的小技巧。[EM328]
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