sql server 상태 모니터링

쿼리를 통해 상태를 확인 할 수 있다.
자세한 내용은 https://technet.microsoft.com/ko-kr/library/bb838723(v=office.12).aspx 확인 가능

------sql 텍스트를 사용 캐시된 계획별로 집계한 cpu 사용량 (쿼리보 보여줌)
SELECT
total_cpu_time,
total_execution_count,
number_of_statements,
s2.text
--(SELECT SUBSTRING(s2.text, statement_start_offset / 2, ((CASE WHEN statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), s2.text)) * 2) ELSE statement_end_offset END) - statement_start_offset) / 2) ) AS query_text
FROM
(SELECT TOP 50
SUM(qs.total_worker_time) AS total_cpu_time,
SUM(qs.execution_count) AS total_execution_count,
COUNT(*) AS number_of_statements,
qs.sql_handle --,
--MIN(statement_start_offset) AS statement_start_offset,
--MAX(statement_end_offset) AS statement_end_offset
FROM
sys.dm_exec_query_stats AS qs
GROUP BY qs.sql_handle
ORDER BY SUM(qs.total_worker_time) DESC) AS stats
CROSS APPLY sys.dm_exec_sql_text(stats.sql_handle) AS s2
;


------------평균 이상의 cpu 사용률을 보이는 상위 50개 쿼리 보여줌---


SELECT TOP 50
total_worker_time/execution_count AS [Avg CPU Time],
(SELECT SUBSTRING(text,statement_start_offset/2,(CASE WHEN statement_end_offset = -1 then LEN(CONVERT(nvarchar(max), text)) * 2 ELSE statement_end_offset end -statement_start_offset)/2) FROM sys.dm_exec_sql_text(sql_handle)) AS query_text, *
FROM sys.dm_exec_query_stats
ORDER BY [Avg CPU Time] DESC
;


---------가장 많은 누적 cpu 사용량을 보이는 쿼리-----------

SELECT
highest_cpu_queries.plan_handle,
highest_cpu_queries.total_worker_time,
q.dbid,
q.objectid,
q.number,
q.encrypted,
q.[text]
from
(select top 50
qs.plan_handle,
qs.total_worker_time
from
sys.dm_exec_query_stats qs
order by qs.total_worker_time desc) as highest_cpu_queries
cross apply sys.dm_exec_sql_text(plan_handle) as q
order by highest_cpu_queries.total_worker_time desc
;


-------cpu 사용량이 집중적으로 사용할수 있는 연산자 표시--------
select *
from
sys.dm_exec_cached_plans
cross apply sys.dm_exec_query_plan(plan_handle)
where
cast(query_plan as nvarchar(max)) like '%Sort%'
or cast(query_plan as nvarchar(max)) like '%Hash Match%'


------차단 세션 확인-----
select blocking_session_id, wait_duration_ms, session_id from
sys.dm_os_waiting_tasks
where blocking_session_id is not null
;
blocking_session_id 를 통해 해당 쿼리 확인
dbcc INPUTBUFFER(87)



-----서버의 상태값 확인 1000이면 높은편이지만 서버 상태에 따라 100도 높을수 있다
DECLARE @BRPS BIGINT
SELECT @BRPS=cntr_value
FROM sys.dm_os_performance_counters
WHERE counter_name LIKE 'Batch Requests/sec%'
WAITFOR DELAY '000:00:10'
SELECT (cntr_value-@BRPS)/10.0 AS "Batch Requests/sec"
FROM sys.dm_os_performance_counters
WHERE counter_name LIKE 'Batch Requests/sec%'
;

-------서버 하드 용량 확인---------
exec master.dbo.xp_fixeddrives;

-----가용 메모리 확인--------------
SELECT available_physical_memory_kb/1024 as "Total Memory MB",
available_physical_memory_kb/(total_physical_memory_kb*1.0)*100 AS "% Memory Free"
FROM sys.dm_os_sys_memory
;