sql server 查看tempdb使用的相关视图

1、tempdb使用查询，查询当前的tempdb数据库
SELECT  'tempdb' AS database_name , GETDATE() AS Time , SUM(user_object_reserved_page_count)/128. AS user_objects_mb , 
        SUM(internal_object_reserved_page_count)/128. AS internal_objects_mb , SUM(version_store_reserved_page_count)/128. AS version_store_kb , 
        SUM(unallocated_extent_page_count)/128. AS freespace_mb 
FROM    sys.dm_db_file_space_usage 
WHERE   database_id = 2                                                     
 
2、tempdb临时数据库分配给各个会话的使用情况   
SELECT  t1.session_id , t1.internal_objects_alloc_page_count , t1.user_objects_alloc_page_count , t1.internal_objects_dealloc_page_count , 
        t1.user_objects_dealloc_page_count , t3.login_time , t3.login_name , t3.host_name , t3.nt_domain , t3.nt_user_name , t3.program_name , 
        t3.status , t3.client_interface_name , t3.cpu_time , t3.memory_usage , t3.total_scheduled_time , t3.total_elapsed_time , 
        t3.last_request_start_time , t3.last_request_end_time , t3.reads , t3.writes , t3.logical_reads , t3.is_user_process , t3.row_count , 
        t3.prev_error , t3.original_security_id , t3.original_login_name , t3.last_successful_logon , t3.last_unsuccessful_logon , 
        t3.unsuccessful_logons , t3.group_id 
FROM    sys.dm_db_session_space_usage t1 ,                                
        sys.dm_exec_sessions AS t3 
WHERE   t1.session_id = t3.session_id 
        AND ( 
             t1.internal_objects_alloc_page_count > 0 
             OR t1.user_objects_alloc_page_count > 0 
             OR t1.internal_objects_dealloc_page_count > 0 
             OR t1.user_objects_dealloc_page_count > 0 
            )  如果查询出来，发现某个用户使用较大，可以通过如下语句来查询出当前执行的会话
select p.spid,t.text from sys.sysprocesses p CROSS  APPLY sys.dm_exec_sql_text( p.sql_handle ) t where p.spid in (250,356,472)
 
3、返回正在运行并且做过空间申请的session正在运行的语句
  
SELECT  t1.session_id , st.text , GETDATE() 
FROM    sys.dm_db_session_space_usage AS t1 , 
        sys.dm_exec_requests AS t4 
CROSS APPLY sys.dm_exec_sql_text(t4.sql_handle) AS st 
WHERE   t1.session_id = t4.session_id 
        AND t1.session_id > 50 
        AND ( 
             t1.internal_objects_alloc_page_count > 0 
             OR t1.user_objects_alloc_page_count > 0 
             OR t1.internal_objects_dealloc_page_count > 0 
             OR t1.user_objects_dealloc_page_count > 0 
            )   4、返回正在运行的活动的空间使用情况以及语句内容和执行计划   
WITH task_space_usage AS ( 
    -- SUM alloc/delloc pages  
    SELECT session_id, 
           request_id, 
           SUM(internal_objects_alloc_page_count) AS alloc_pages, 
           SUM(internal_objects_dealloc_page_count) AS dealloc_pages 
    FROM sys.dm_db_task_space_usage WITH (NOLOCK) 
    WHERE session_id <> @@SPID 
    GROUP BY session_id, request_id 
) 
SELECT TSU.session_id, 
       TSU.alloc_pages * 1.0 / 128 AS [internal object MB space], 
       TSU.dealloc_pages * 1.0 / 128 AS [internal object dealloc MB space], 
       EST.text, 
       -- Extract statement from sql text  
       ISNULL( 
           NULLIF( 
               SUBSTRING( 
                   EST.text,  
                   ERQ.statement_start_offset / 2,  
                   CASE WHEN ERQ.statement_end_offset < ERQ.statement_start_offset THEN 0 ELSE( ERQ.statement_end_offset - ERQ.statement_start_offset ) / 2 END 
               ), '' 
           ), EST.text 
       ) AS [statement text], 
       EQP.query_plan 
FROM task_space_usage AS TSU 
INNER JOIN sys.dm_exec_requests ERQ WITH (NOLOCK) 
    ON  TSU.session_id = ERQ.session_id 
    AND TSU.request_id = ERQ.request_id 
OUTER APPLY sys.dm_exec_sql_text(ERQ.sql_handle) AS EST 
OUTER APPLY sys.dm_exec_query_plan(ERQ.plan_handle) AS EQP 
WHERE EST.text IS NOT NULL OR EQP.query_plan IS NOT NULL 
ORDER BY 3 DESC, 5 DESC