常用命令

-----查看sql 读取IO

SELECT
SPID = er.session_id
,Status = ses.status
,[Login] = ses.login_name
,Host = ses.host_name
,BlkBy = er.blocking_session_id
,DBName = DB_Name(er.database_id)
,CommandType = er.command
,SQLStatement = st.text
,ObjectName = OBJECT_NAME(st.objectid)
,ElapsedMS = er.total_elapsed_time
,CPUTime = er.cpu_time
,IOReads = er.logical_reads + er.reads
,IOWrites = er.writes
,LastWaitType = er.last_wait_type
,StartTime = er.start_time
,Protocol = con.net_transport
,ConnectionWrites = con.num_writes
,ConnectionReads = con.num_reads
,ClientAddress = con.client_net_address
,Authentication = con.auth_scheme
FROM sys.dm_exec_requests er
OUTER APPLY sys.dm_exec_sql_text(er.sql_handle) st
LEFT JOIN sys.dm_exec_sessions ses
ON ses.session_id = er.session_id
LEFT JOIN sys.dm_exec_connections con
ON con.session_id = ses.session_id
WHERE er.session_id > 50
--AND @SessionID IS NULL OR er.session_id = @SessionID
ORDER BY
er.blocking_session_id DESC
,er.session_id

----查询阻塞的sql 语句

SELECT * FROM master.sys.sysprocesses WHERE blocked<>0

WITH temp ( BSID, SID, sql_handle )
AS ( SELECT blocking_session_id ,
session_id ,
sql_handle
FROM sys.dm_exec_requests
WHERE blocking_session_id <> 0
UNION ALL
SELECT A.blocking_session_id ,
A.session_id ,
A.sql_handle
FROM sys.dm_exec_requests A
JOIN temp B ON A.SESSION_ID = B.BSID
)
SELECT C.BSID ,
C.SID ,
S.login_name ,
S.host_name ,
S.status ,
S.cpu_time ,
S.memory_usage ,
S.last_request_start_time ,
S.last_request_end_time ,
S.logical_reads ,
S.row_count ,
q.text
FROM temp C
JOIN sys.dm_exec_sessions S ON C.sid = s.session_id
CROSS APPLY sys.dm_exec_sql_text(C.sql_handle) Q
ORDER BY sid