sql server performance counters list

, and spikes in CPU and memory resource consumption occur on the server. System structure The performance problem stems from the whole structure and development process of the system. The application of the Olite system is a Web Form program based on the. NET platform, and the database is SQL Server 2005. Its main stru

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 DESC PS: the information you obtain is a list of proposals. The final decision lies in you. In addition, DMV stores up to 500 indexes. We have created indexes to Improve the

-consuming to index the above, so the efficiency is lower than using the self-increment field.3, CombGiven the pros and cons of the two primary key types above, the comb type can be used to find a balance for both. Its design idea is this: since the GUID type has no regularity can be made index inefficient, affecting the performance of the system, then can not be combined to preserve the GUID of the first 10 bytes, with the latter 6 bytes to represent

disperse the concurrency pressure of the large scale data, also can speed up the speed of special query, the redundant field can reduce the connection of database table effectively and improve the efficiency.3.Design of the primary keyThe primary key is necessary, and the primary key for SQL Server is a unique index, and in practice, we tend to choose the smallest key group to work as the primary key, so t

are in order.Then, when SQL Server is doing all of these things, it creates locks to ensure that users get meaningful results. SQL Server guarantees that when each statement is executed, the database is fully predictable (for example, predicting how SQL executes) and managi

Performance Comparison Between ISNULL and COALESCE in the paging mode of SQL Server, isnullcoalesce Preface In the previous section, we explained the data type and several notes in the string. In this section, we will continue to talk about the number of string lines, other content and interspersed content, short content, and in-depth explanation. (For details, s

During database design, sometimes attribute record values belonging to the same person are stored in multiple records for the purpose of data standardization, you want to merge multiple attribute data into one row for display. This is a row-to-column conversion. For example, the score table. What is the efficiency of Row-to-column conversion? I tried the following three methods to perform a row-to-column test. The number of records in the test data table is 120Tens of thousands of fields1

SQL Server performance optimization involves many aspects, such as good system and database design, high-quality SQL writing, appropriate data table index design, and even various hardware factors: network performance, server

) + ' _ ' + CONVERT (varchar,d.index_handle) + ' _ ' + replace (replace (replace ([statement], '] ', '), ' [', ' "), '. ' , ') + ' + ' + ' on ' + [statement] + ' (' + 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

not fully covered, at least to explain a part. Above we get the results to view the execution time, now let's look at both the query execution plan. Select COALESCE (select MAX (index_id) from sys.indexes WHERE [object_id] = t.[object_id]), 0) from sys.tables as T; select ISNULL (SELECT MAX (index_id) from sys.indexes WHERE [object_id] = t.[object_id]), 0) from sys.tables as T; The above may not be accurate, but also related to hardware configuration, it is possible to coale

Label:Today I would like to talk about a special topic in SQL Server--Instant file initialization (Instant initialization). For your instance of SQL Server, if you enable Instant file initialization, you will get a huge performance boost under certain circumstances. Instant

Tags: des c style Blog Code AOriginal: [Translate]--SQL server 5 performance killers using linked serversForeword: This article is to blog http://www.dbnewsfeed.com/2012/09/08/5-performance-killers-when-working-with-linked-servers/ Translation, if the translation is not good or bad place, please point out, we study pro