查看连接当前数据库的SPID所加的锁

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SELECT DB_NAME(resource_database_id) AS DatabaseName
, request_session_id
, resource_type
, CASE
WHEN resource_type = 'OBJECT'
THEN OBJECT_NAME(resource_associated_entity_id)
WHEN resource_type IN ('KEY', 'PAGE', 'RID')
THEN (SELECT OBJECT_NAME(OBJECT_ID)
FROM sys.partitions p
WHERE p.hobt_id = l.resource_associated_entity_id)
END AS resource_type_name
, request_status
, request_mode
FROM sys.dm_tran_locks l
WHERE request_session_id !=@@spid
ORDER BY request_session_id

结果如图:

如果像查看更多的锁，调整where条件即可

查看没关闭事务的空闲Session

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SELECT es.session_id, es.login_name, es.host_name, est.text
  , cn.last_read, cn.last_write, es.program_name
FROM sys.dm_exec_sessions es
INNER JOIN sys.dm_tran_session_transactions st
            ON es.session_id = st.session_id
INNER JOIN sys.dm_exec_connections cn
            ON es.session_id = cn.session_id
CROSS APPLY sys.dm_exec_sql_text(cn.most_recent_sql_handle) est
LEFT OUTER JOIN sys.dm_exec_requests er                    
            ON st.session_id = er.session_id
                AND er.session_id IS NULL

查看被阻塞的语句和它们的等待时间

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SELECT
  Waits.wait_duration_ms / 1000 AS WaitInSeconds
  , Blocking.session_id as BlockingSessionId
  , DB_NAME(Blocked.database_id) AS DatabaseName
  , Sess.login_name AS BlockingUser
  , Sess.host_name AS BlockingLocation
  , BlockingSQL.text AS BlockingSQL
  , Blocked.session_id AS BlockedSessionId
  , BlockedSess.login_name AS BlockedUser
  , BlockedSess.host_name AS BlockedLocation
  , BlockedSQL.text AS BlockedSQL
  , SUBSTRING (BlockedSQL.text, (BlockedReq.statement_start_offset/2) + 1,
    ((CASE WHEN BlockedReq.statement_end_offset = -1
      THEN LEN(CONVERT(NVARCHAR(MAX), BlockedSQL.text)) * 2
      ELSE BlockedReq.statement_end_offset
      END - BlockedReq.statement_start_offset)/2) + 1)
                    AS [Blocked Individual Query]
  , Waits.wait_type
FROM sys.dm_exec_connections AS Blocking                         
INNER JOIN sys.dm_exec_requests AS Blocked
            ON Blocking.session_id = Blocked.blocking_session_id
INNER JOIN sys.dm_exec_sessions Sess
            ON Blocking.session_id = sess.session_id 
INNER JOIN sys.dm_tran_session_transactions st
            ON Blocking.session_id = st.session_id
LEFT OUTER JOIN sys.dm_exec_requests er
            ON st.session_id = er.session_id
                AND er.session_id IS NULL
INNER JOIN sys.dm_os_waiting_tasks AS Waits
            ON Blocked.session_id = Waits.session_id
CROSS APPLY sys.dm_exec_sql_text(Blocking.most_recent_sql_handle)
                             AS BlockingSQL
INNER JOIN sys.dm_exec_requests AS BlockedReq                    
            ON Waits.session_id = BlockedReq.session_id
INNER JOIN sys.dm_exec_sessions AS BlockedSess
            ON Waits.session_id = BlockedSess.session_id
CROSS APPLY sys.dm_exec_sql_text(Blocked.sql_handle) AS BlockedSQL
ORDER BY WaitInSeconds

查看超过30秒等待的查询

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SELECT
  Waits.wait_duration_ms / 1000 AS WaitInSeconds
  , Blocking.session_id as BlockingSessionId
  , Sess.login_name AS BlockingUser
  , Sess.host_name AS BlockingLocation
  , BlockingSQL.text AS BlockingSQL
  , Blocked.session_id AS BlockedSessionId
  , BlockedSess.login_name AS BlockedUser
  , BlockedSess.host_name AS BlockedLocation
  , BlockedSQL.text AS BlockedSQL
  , DB_NAME(Blocked.database_id) AS DatabaseName
FROM sys.dm_exec_connections AS Blocking                        
INNER JOIN sys.dm_exec_requests AS Blocked
            ON Blocking.session_id = Blocked.blocking_session_id
INNER JOIN sys.dm_exec_sessions Sess
            ON Blocking.session_id = sess.session_id 
INNER JOIN sys.dm_tran_session_transactions st
            ON Blocking.session_id = st.session_id
LEFT OUTER JOIN sys.dm_exec_requests er
            ON st.session_id = er.session_id
                AND er.session_id IS NULL
INNER JOIN sys.dm_os_waiting_tasks AS Waits
            ON Blocked.session_id = Waits.session_id
CROSS APPLY sys.dm_exec_sql_text(Blocking.most_recent_sql_handle)
                                     AS BlockingSQL
INNER JOIN sys.dm_exec_requests AS BlockedReq                   
            ON Waits.session_id = BlockedReq.session_id
INNER JOIN sys.dm_exec_sessions AS BlockedSess
            ON Waits.session_id = BlockedSess.session_id
CROSS APPLY sys.dm_exec_sql_text(Blocked.sql_handle) AS BlockedSQL
WHERE Waits.wait_duration_ms > 30000
ORDER BY WaitInSeconds

buffer中缓存每个数据库所占的buffer

SET TRAN ISOLATION LEVEL READ UNCOMMITTED
SELECT
    ISNULL(DB_NAME(database_id), 'ResourceDb') AS DatabaseName
    , CAST(COUNT(row_count) * 8.0 / (1024.0) AS DECIMAL(28,2))
                                                   AS [Size (MB)]
FROM sys.dm_os_buffer_descriptors
GROUP BY database_id
ORDER BY DatabaseName

结果如图:

当前数据库中每个表所占缓存的大小和页数

SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
SELECT 
     OBJECT_NAME(p.[object_id]) AS [TableName]
     , (COUNT(*) * 8) / 1024   AS [Buffer size(MB)]
     , ISNULL(i.name, '-- HEAP --') AS ObjectName
     ,  COUNT(*) AS NumberOf8KPages
FROM sys.allocation_units AS a
INNER JOIN sys.dm_os_buffer_descriptors AS b
    ON a.allocation_unit_id = b.allocation_unit_id
INNER JOIN sys.partitions AS p
INNER JOIN sys.indexes i ON p.index_id = i.index_id
                         AND p.[object_id] = i.[object_id]
    ON a.container_id = p.hobt_id
WHERE b.database_id = DB_ID()
  AND p.[object_id] > 100
GROUP BY p.[object_id], i.name
ORDER BY NumberOf8KPages DESC

结果如下:

数据库级别等待的IO

SET TRAN ISOLATION LEVEL READ UNCOMMITTED
SELECT DB_NAME(database_id) AS [DatabaseName]
  , SUM(CAST(io_stall / 1000.0 AS DECIMAL(20,2))) AS [IO stall (secs)]
  , SUM(CAST(num_of_bytes_read / 1024.0 / 1024.0 AS DECIMAL(20,2)))
                                                        AS [IO read (MB)
  , SUM(CAST(num_of_bytes_written / 1024.0 / 1024.0  AS DECIMAL(20,2)))
                                                     AS [IO written (MB)
  , SUM(CAST((num_of_bytes_read + num_of_bytes_written)
                   / 1024.0 / 1024.0 AS DECIMAL(20,2))) AS [TotalIO (MB)
FROM sys.dm_io_virtual_file_stats(NULL, NULL)
GROUP BY database_id
ORDER BY [IO stall (secs)] DESC

结果如下:

按文件查看IO情况

SET TRAN ISOLATION LEVEL READ UNCOMMITTED
SELECT DB_NAME(database_id) AS [DatabaseName]
  , file_id
  , SUM(CAST(io_stall / 1000.0 AS DECIMAL(20,2))) AS [IO stall (secs)]
  , SUM(CAST(num_of_bytes_read / 1024.0 / 1024.0 AS DECIMAL(20,2)))
                                                     AS [IO read (MB)]
  , SUM(CAST(num_of_bytes_written / 1024.0 / 1024.0  AS DECIMAL(20,2)))
                                                  AS [IO written (MB)]
                                                    , SUM(CAST((num_of_bytes_read + num_of_bytes_written)
                / 1024.0 / 1024.0 AS DECIMAL(20,2))) AS [TotalIO (MB)]
FROM sys.dm_io_virtual_file_stats(NULL, NULL)
GROUP BY database_id, file_id
ORDER BY [IO stall (secs)] DESC

结果如下: