首页 / 数据库 / SQLServer / 查看sql server 2008中性能低下的语句
查看sql server 2008中性能低下的语句2014-03-14 csdn博客 ocpyang经常使用这个语句来查看性能低下的sql语句:SELECT creation_time N"语句编译 时间" ,last_execution_time N"上次执行时间 " ,total_physical_reads N"物理读取总次数" ,total_logical_reads/execution_count N"每次逻辑读次数 " ,total_logical_reads N"逻辑读取总次数 " ,total_logical_writes N"逻辑写入总次数" ,execution_count N"执行次数" ,total_worker_time/1000 N"所用的CPU总时间ms" ,total_elapsed_time/1000 N"总花费时间ms" ,(total_elapsed_time / execution_count)/1000 N"平均时间ms" ,SUBSTRING(st.text, (qs.statement_start_offset/2) + 1, ((CASE statement_end_offset WHEN -1 THEN DATALENGTH(st.text) ELSE qs.statement_end_offset END - qs.statement_start_offset)/2) + 1) N"执行语句"FROM sys.dm_exec_query_stats AS qsCROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) stwhere SUBSTRING(st.text, (qs.statement_start_offset/2) + 1, ((CASE statement_end_offset WHEN -1 THEN DATALENGTH (st.text) ELSE qs.statement_end_offset END - qs.statement_start_offset)/2) + 1) not like "% fetch%" and qs.execution_count>10000 and (total_elapsed_time / execution_count)/1000>150ORDER BY total_elapsed_time / execution_count DESC;