zoukankan      html  css  js  c++  java
  • 数据库优化,性能分析

    查询占用cpu最高的20条sql语句,sql2008

    SELECT TOP 10 a.creation_time,
    total_worker_time/execution_count AS avg_cpu_cost, plan_handle,
    execution_count,
    (SELECT SUBSTRING(text, statement_start_offset/2 + 1,
    (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) b) AS query_text
    FROM sys.dm_exec_query_stats a
    ORDER BY [avg_cpu_cost] DESC
    

    查看死锁

    use master
    go
    declare @spid int,@bl int
    DECLARE s_cur CURSOR FOR 
    select  0 ,blocked
    from (select * from sysprocesses where  blocked>0 ) a 
    where not exists(select * from (select * from sysprocesses where  blocked>0 ) b 
    where a.blocked=spid)
    union select spid,blocked from sysprocesses where  blocked>0
    OPEN s_cur
    FETCH NEXT FROM s_cur INTO @spid,@bl
    WHILE @@FETCH_STATUS = 0
    begin
    if @spid =0 
                select '引起数据库死锁的是: '+ CAST(@bl AS VARCHAR(10)) + '进程号,其执行的SQL语法如下'
    else
                select '进程号SPID:'+ CAST(@spid AS VARCHAR(10))+ '被' + '进程号SPID:'+ CAST(@bl AS VARCHAR(10)) +'阻塞,其当前进程执行的SQL语法如下'
    DBCC INPUTBUFFER (@bl )
    FETCH NEXT FROM s_cur INTO @spid,@bl
    end
    CLOSE s_cur
    DEALLOCATE s_cur
    
    exec sp_who2
    

      

  • 相关阅读:
    使用VS进入源码调试
    Nlog配置
    一个极简的爬虫
    简单的调用图灵机器人
    docker部署netcore项目 nginx负载均衡
    windows nginx负载均衡
    windows服务器环境配置redis sentinel部署
    ASP.NET资源大全-知识分享
    ABP动态生成WebAPI
    windows服务器环境下安装redis
  • 原文地址:https://www.cnblogs.com/haiyabtx/p/3833616.html
Copyright © 2011-2022 走看看