SQL Serverparseand compile time: CPU time = 0 ms, elapsed time = 0ms. SQL Server Execution Times: CPU time = 452 ms, elapsed time = 458ms. 虽然返回24行只用了半秒的时间但是还是不够优化。那么我们就在linetotal建一个索引 CREATE NONCLUSTERED INDEXidx_SalesOrderDetail_LineTotal ONSales.SalesOrde...
若要識別目前負責高 CPU 活動的查詢,請執行下列語句: SQL SELECTTOP10s.session_id, r.status, r.cpu_time, r.logical_reads, r.reads, r.writes, r.total_elapsed_time / (1000*60)'Elaps M',SUBSTRING(st.TEXT, (r.statement_start_offset /2) +1, ((CASEr.statement_end_offsetWHEN-1THENDATALE...
捕捉像锁和执行计划这样的事件时应该小心进行,因为输出会变得非常大并降低SQL Server性能。 2、 丢弃性能分析所用的启动事件: 像SP:StmtStarting这样的启动事件不提供分析信息,因为只有事件完成才能计算I/O量、CPU负载和查询的持续时间。 使用捕捉启动事件的时机是:预期某些SQL查询因为错误而不能结束执行,或者频繁发现A...
在 DBMS 与其他应用程序共享系统的服务器上,除了此计数器外,还需要查看 % Processor Time 和 Context Switches/sec 性能计数器(稍后我将简要介绍一下上下文切换),从而确定是否需要将其他应用程序或 DBMS 移至其他服务器。 了解处理器队列和高 CPU 利用率后,下面我们查看 SQL Server:SQL Statistic 性能对象下的 ...
v.cpu_time, v.disk_reads, rank() over(order by v.elapsed_time desc) elapsed_rank from v$sql v ) a where elapsed_rank <= 100 and last_load_time > to_char(sysdate - 1/24, 'YYYY-MM-DD/HH:MI:SS') order by "执行时间'S'" desc ...
SQL Server Execution Times: CPU time = 460 ms, elapsed time = 470 ms. If you can collect a query plan, check the data from the Execution plan properties. Run the query with Include Actual Execution Plan on. Select the left-most operator from Execution plan. From Properties, expand ...
CPUtime=3945ms, elapsedtime=148524ms. The server is pretty powerful (from memory 48GB ram, 24 core processor) running sql server 2008 r2 x64. Update I found this code to create a table with 1,000,000 records. I thought i could then runSELECT TOP 100 * FROM testEnvironment ORDER BY ...
-> System.Data.SqlClient.SqlException: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. -> System.ComponentModel.Win32Exception: The wait operation timed out無法連線到 < 伺服器名稱 >...
但是从IO开销,以及CPU time、elapsed time对比来看,两者几乎没有什么差异。在这个案例中,并不是走索引查找(Index Seek)就真的开销代价小很多。 考虑到这里数据量较小,我使用网上的一个脚本,在AdventureWorks2014数据库构造了一个10000000的大表,然后顺便做了一些测试对比 CREATE TABLE dbo.TestLIKESearches ( ID1 ...
SQL Server Execution Times: CPU time = 6 ms, elapsed time = 6 ms. Share Improve this answer Follow answered Nov 23, 2011 at 18:58 user596075 Show 5 more comments 169 Turn on Client Statistics by doing one of the following: Menu: Query > Include client Statistics Too...