sql server performance tuning best practices

1. Check the database space usage to see which tables are consuming larger disk spaceExecute the following statement:SelectO.name, SUM (p.reserved_page_count) asReserved_page_count, SUM (p.used_page_count) asUsed_page_count, SUM ( CaseWhen (p.index_id2) Then (p.in_row_data_page_count+P.lob_used_page_count+p.row_overflow_used_page_count)Elsep.lob_used_page_count+P.row_overflow_used_page_count End) asDataPages, SUM ( CaseWhen (p.index_id2) then Row_countElse 0end) asrowcounts fromsys.dm_db_partiti

, one is not perfect function also dare to take Out (2000) The second functional architecture of the outstanding design makes the function has a strong continuity and Scalability (2005 2000 of the function to retain and improve). The optimization tool is simple to use 1: Use SQL Server Porfiler (Event Viewer) to record all the steps of the operation database in the business system and save it as a working

] + ' (' + ISNULL (equality_columns, ') + case when equality_columns are not Null and Inequality_columns is isn't NULL then ', ' ELSE ' END + ISNULL (inequality_columns, ') + ') ' + Isnul L (' INCLUDE (' + included_columns + ') ', ') as Create_index_syntaxfrom sys.dm_db_missing_index_groups as Ginner JOIN Sys.dm_db_missing_index_group_stats as Gson gs.group_handle = G.index_group_handleinner JOIN sys.dm_db_missing_index_ Details as DON g.index_handle = D.index_handleorder by possibleimprovement

The class "Performance Tuning for large-scale and high-traffic Internet sites" is the last good class I attended. I thought this class was mostly about background services, in fact, I am mainly talking about client optimization. I mainly talk about 14 standards. I vaguely felt where I met these 14 standards. Then I checked google, it is true that these 14 items are not new, but they are not too concerned 《

:16TAB1 small, TAB2 billion level above, two weeks data in tens of millions of.Lan Hua Main 16:13:22Ok.Orchid Island Main 16:16:29So change the SQL:with T1 as (Select count (t.c1), t.c1,t.c2,t.c3,t.c4,t.c5From Tab1 twhere T.c2 not in (' Val1 ', ' val2 ', ' val3 ', ' val4 ', ' VAL5 ')and C1 is not NULLGroup by T.C1, T.C2,T.C3,T.C4,T.C5)Select T1.c1,t1.c2,t1.c3,t1.c4,t1.c5from T1Where NOT EXISTS (Select/*+ Use_hash (m,n) */M.C1, M.C2,M.C3,M.C4,M.C5from T1 m,tab2 Nwhere N.c2 > Sysdate-14and m.c1 =

Today we will mainly talk about the DB2 Performance Tuning design and configuration of your database. There are many database design and configuration options that can affect the query performance. For more suggestions on Database Design, see the "Planning your Physical Database Design" Best Practices article. Use con

server| Performance 1, in the program, to ensure that in the implementation of the function of the foundation, minimizing the number of accesses to the database, minimizing the number of accesses to the table by searching the parameters, minimising the result set, and reducing the burden of the network; the ability to separate the operations as much as possible, to improve the response rate each time; When

When the system is finished, performance problems are often an important issue in warranty and later maintenance. These days, the customer has to reflect that there is a very slow query. This query uses a primary key query, because the primary key is a clustered index and is fragmented. should be very fast. But the phenomenon of seeing is very slow (10 seconds or so, the worst is more than 18 seconds). Eliminates the problem of hardware, resource loc

Linux server performance tuning skills, linux Server TuningPerformance tuning skills for 20 Linux servers Guide Linux is an open-source operating system that supports various hardware platforms. Linux servers are world-renowned. The main difference between Linux