Comment: optimisation des performances basée sur l'utilisation dans SQL Server 2008 Express

Question

Comment puis-je effectuer une optimisation de la performance basée sur l'utilisation si j'exécute SQL Server 2008 Express et utilise SQL Server Management Studio Express?

Answer 1

Les vues de gestion dynamique existent-elles dans SQL Server Express? Essayez d'utiliser sys.dm_exec_query_stats pour voir si vous obtenez un résultat. Si c'est le cas, j'ai des procédures stockées que vous pouvez exécuter pour optimiser les performances. Je vous donne un exemple de l'une des procédures, et je peux en poster d'autres si vous le souhaitez.

CREATE PROCEDURE [ADMIN].[spExecutionTimeStats] 
       @DBName     AS SYSNAME 
    AS 
    -- +---------------------------------------------------------------------------------------------------------------- 
     -- ! O b j e c t   : ADMIN.spExecutionTimeStats 
     -- ! R e t u r n s  : NONE 
     -- ! P a r a m e t e r s : Name     DataType  Description 
     -- +      ======================= ============== ================================================== 
     -- !            @dbname         sysname 
     -- + --------------------------------------------------------------------------------------------------------------- 
     -- ! O b j e c t i v e : 
     -- + --------------------------------------------------------------------------------------------------------------- 
     -- ! S A M P L E S  : 
     -- !            EXEC ADMIN.spExecutionTimeStats 'DWH' 
     -- !            EXEC ADMIN.spExecutionTimeStats 'DWH_TOOLKIT' 
     -- !            EXEC ADMIN.spExecutionTimeStats 'DWH_HISTORY' 
     -- + --------------------------------------------------------------------------------------------------------------- 
     -- ! H i s t o r y  : 
     -- + --------------------------------------------------------------------------------------------------------------- 
     -- !      Date  Who What 
     -- +      ========== ===== ======================================================================== 
     -- !           2009-09-04 HAWI Initial version 
     -- +---------------------------------------------------------------------------------------------------------------- 

    --DECLARE @DBName AS SYSNAME='DWH' 
    DECLARE @SQL NVARCHAR(MAX) 

    SET @SQL='SELECT TOP 100 percent 
          ''' +@DBName +'''AS DBName, 
       OBJECT_SCHEMA_NAME(s.object_id, DB_ID(''' +@DBName +''')) AS Schema_name, 
       S.name, 
       D.execution_count, 
       D.total_physical_reads, 
       D.total_logical_reads, 
       d.total_logical_writes, 
       d.last_execution_time, 
       total_elapsed_time_s=convert(money,d.total_elapsed_time)/1000000, 
       max_elapsed_time_s=convert(money,D.max_elapsed_time)/1000000, 
       last_elapsed_time_s=convert(money,d.last_elapsed_time)/1000000, 
       min_elapsed_time_s=convert(money,D.min_elapsed_time)/1000000, 
       avg_time_s=(convert(money,d.total_elapsed_time)/d.execution_count)/1000000, 
       d.sql_handle as proc_handle, 
       stmnt.* 
    FROM ' + @dbname + '.sys.procedures s 
       INNER JOIN ' + @dbname + '.sys.dm_exec_procedure_stats d 
          ON s.object_id = d.object_id 
       LEFT JOIN 
           (
            SELECT TOP 100 PERCENT 
            QS.sql_handle,   
            ROW_NUMBER() OVER(PARTITION BY qs.sql_handle ORDER BY statement_start_offset) AS statement_no,  
            qs.execution_count, 
            qs.total_physical_reads, 
            qs.total_logical_reads, 
            qs.total_logical_writes, 
            qs.last_execution_time, 
            sql_total_elapsed_time_s=convert(money,qs.total_elapsed_time)/1000000, 
            sql_max_elapsed_time_s=convert(money,qs.max_elapsed_time)/1000000, 
            sql_last_elapsed_time_s=convert(money,qs.last_elapsed_time)/1000000, 
            sql_min_elapsed_time_s=convert(money,qs.min_elapsed_time)/1000000, 
            sql_avg_time_s=(convert(money,qs.total_elapsed_time)/qs.execution_count)/1000000,    
            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) AS statement_text 
            FROM ' + @dbname + '.sys.dm_exec_query_stats AS QS 
            CROSS APPLY ' + @dbname + '.sys.dm_exec_sql_text(QS.sql_handle) as ST 
           ) AS stmnt 
          ON d.sql_handle=stmnt.sql_handle 
    WHERE 
       convert(money,d.total_elapsed_time)/d.execution_count/1000000>10 
       OR 
       d.last_elapsed_time > (d.total_elapsed_time/d.execution_count)*1.15 
    ORDER BY avg_time_s DESC;' 

    PRINT @SQL; 
    EXEC sp_executeSQL @SQL; 
    GO