监控数据库的连接数
select COUNT( * ) from master.dbo.sysprocesses
select COUNT( * ) from master.dbo.sysprocesses where dbid=DB_ID('WKOMS') and hostname='OMS-APP'
select COUNT( * ) from master.dbo.sysprocesses where dbid=DB_ID('WKOMS') and hostname<>'OMS-APP'
查询 SQL Server TOP 20 最大耗时 sql
SELECT TOP 20
total_worker_time/1000 AS [总消耗CPU 时间(ms)],
execution_count [运行次数],
qs.total_worker_time/qs.execution_count/1000 AS [平均消耗CPU 时间(ms)],
last_execution_time AS [最后一次执行时间],
max_worker_time /1000 AS [最大执行时间(ms)],
SUBSTRING(qt.text,qs.statement_start_offset/2+1,
(CASE WHEN qs.statement_end_offset = -1
THEN DATALENGTH(qt.text)
ELSE qs.statement_end_offset END-qs.statement_start_offset)/2 + 1)
AS [使用CPU的语法], qt.text [完整语法],
qt.dbid, dbname=db_name(qt.dbid),
qt.objectid,object_name(qt.objectid,qt.dbid) ObjectName
FROM sys.dm_exec_query_stats qs WITH(nolock)
CROSS apply sys.dm_exec_sql_text(qs.sql_handle) AS qt
WHERE execution_count>1
ORDER BY total_worker_time DESC