常用sqlserver性能分析
查看系统日志
select * from sys.traces
查看sql profile转储文件
- 先要用sql profile监控数据库,导出成trc
- 拷贝至数据库服务器上，eg.d:\sqldata\trace\201611290881.trc
- sql查询中如下语句查看
--SELECT cpu,TextData,Reads,Writes
SELECT *
FROM ::fn_trace_gettable('d:\sqldata\trace\201611290881.trc',default)
WHERE SPID > 50
and StartTime > '2016-11-29 11:30:00.000'
AND cpu > 100
SELECT *
FROM ::fn_trace_gettable('d:\sqldata\trace\201611290881.trc',default)
WHERE SPID > 50
and StartTime > '2016-11-29 11:30:00.000'
AND cpu > 100
ORDER BY cpu DESC
--查看trace文件里内容
select *
from fn_trace_gettable('C:\a.trc',0)
where HostName='SIT1_WIN_API'
order by reads desc
执行统计功能
打开统计功能 set statistics io on
执行具体sql语句
消息中可以看到具体执行情况
查看执行计划
打开执行计划
执行语句
在执行计划tab查看具体执行计划
--查看正在执行的SQL及执行计划
SELECT s .[session_id] ,
r.[start_time] ,
DATEDIFF(s , r .start_time, GETDATE()) AS elapsed_MS ,
r.[status] AS RequestStatus ,
DB_NAME(r .database_id) AS DatabaseName ,
r.[wait_type] ,
r.[wait_resource] ,
r.[wait_time] ,
r.[reads] ,
r.[writes] ,
r.[sql_handle] ,
r.[logical_reads] ,
s.[status] AS SessionStatus ,
s.[host_name] ,
s.[original_login_name] ,
s.[nt_user_name] ,
s.[program_name] ,
s.[client_interface_name] ,
c.[client_net_address] ,
SUBSTRING(qt .text, r. statement_start_offset / 2,
( CASE WHEN r.statement_end_offset = -1
THEN LEN (CONVERT( NVARCHAR(MAX ), qt .text)) * 2
ELSE r .statement_end_offset
END - r. statement_start_offset ) / 2 ) AS ExecutingSQL ,
qp.query_plan
FROM sys .dm_exec_requests r
INNER JOIN sys. dm_exec_sessions s ON r.session_id = s.session_id
LEFT JOIN sys. dm_exec_connections c ON c.session_id = s.session_id
CROSS APPLY sys. dm_exec_sql_text(r .sql_handle) AS qt
CROSS APPLY sys. dm_exec_query_plan(r .plan_handle) AS qp
ORDER BY elapsed_MS DESC
perfmon监控Sql Server锁
--查看阻塞
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
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
