sql server performance tuning videos

: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 =

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

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

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

Label:Original: SQL Server Tuning series advanced (How to index tuning)ObjectiveIn the previous article we analyzed the role of statistical information in the database, and we have learned how the database uses statistics to control the distribution of the contents of tables in the database. Children's shoes are not cl

:37YesOrchid Island Main 15:34:51Oh.Orchid Island Main 15:35:12Other, not quite understand your data in the situation, not very good fine optimization.Orchid Island Main 15:35:44Should still be quick.Snow Leopard 15:36:34GoodSnow Leopard 15:36:36Let me seeOrchid Island Main 15:37:16For example: The index of the other two tablesSnow Leopard 15:37:31WellOrchid Island Main 15:37:43The full table scan, although the table is small, but to 0.5s, should also be a small proportion.Snow Leopard 15:37:55I

of disk accesses. Similarly, ensuring that the MySQL process is working correctly means that it spends more time on the service query than it spends on processing background tasks, such as processing temporary disk tables or opening and closing files. The emphasis of this paper is to adjust the mysqld. The best way is to make sure that the query has been optimized. This means that the appropriate index is applied to the table, and the query is written in a way that makes full use of the MySQL

statements. Using adbc in the abap environment is similar to using JDBC in the Java environment. The reports and transactions they write can use any available interface to access the database. Use DB2 parameters in SAP Open SQL SAP supports a batch of DB2 parameters that can be added to Open SQL statements to affect how natural SQL statements generated from Open

Tags: ATI latest sel Opening technical file reference tis onlineNow has been doing the project, the amount of data is relatively small, at the beginning of the time did not feel, because it is just beginning, the amount of data is very small, in the process of the use of speed is very fast, but with the constant growth of data volume, found that the program is more and more slow, even the problem of timeouts, so to the program Early project is relatively tight, not for the Big Data volume busine

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 = N.c1and t1.c2 = M.C2);Orchid Island Main 16:

Notifications about SQL Server's use of public accounts to push videos. for SQL Server's use of this Weibo account and account is more diversified, and the content is more enriched to exert the media power of Weibo, in the future Weibo and daily push, some videos about SQLSERVER will be pushed as appropriate to give yo

Chapter 2 procedural performance tuning of PL/SQL applications I. Reasons for PL/SQL Performance problems When the execution efficiency of PL/SQL-based applications is low, it is usually caused by poor