[转载]如何查看某个查询使用了多少TempDB空间

http://www.cnblogs.com/CareySon/p/3910337.html

通过下面脚本可以查看某个查询实用的TempDB的空间.

第一步是查询出当下TempDB实用空间是多少，

第二步是执行某查询语句

第三步是用当先TempDB空间-第一步TempDB实用的空间.

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(, 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) / . / .,
        tempdb_write_MB = (SUM(num_of_bytes_written) - @write) / . / .,
        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(, NULL) AS FS
        ON FS.file_id = DBF.file_id
WHERE   DBF.type_desc = 'ROWS'