sql server session state performance

tested before the conclusion.In addition, see SqlServer2014 (SQL 2014 new feature Introduction series-In-memory OLTP (In-memory OLTP)) also made a large adjustment, basically support memory storage, can be asynchronously quickly stored in memory, the scheme for the current device, I'm afraid it won't work.Other, later in the search process learned how to achieve a copy, copy the scene of the application Mode (actual combat).To replace

, generally believed that the closer the data from the method efficiency higher. With a careful use of cascading deletes and cascading updates, cascading deletes and cascading updates as new features of SQL SERVER 2000, are reserved in 2005 and should be available. I'm talking about caution here, because cascading deletions and cascading updates have broken through the traditional definition of foreign keys

To maximize the performance of SQL Server, you must first identify several aspects. When these several aspects are optimized, the whole system performance can be improved to the greatest extent. You can then analyze these several aspects. Otherwise, you may not be able to do it. Experience has shown that the

'. Scan count 1, logical read 1 times, physical read 0 times, read 0 times, LOB logic read 0 times, lob physical read 0 times, lob read 0 times. (6 rows affected) (1 rows affected) SQL Server Execution Time: CPU time = 0 milliseconds, elapsed time = 528 milliseconds. (500 rows affected) Table ' worktable '. Scan count 0, logical read 0 times, physical read 0 times, read 0 times, LOB logic read 0 times, lob

A few SQL Server paging stored procedure writing and performance comparisonsStored procedure 5 Kinds of pagination, the following code is from the forgotten when from someone else that CTRL + C, so just as a collection, hope the author see don't Spray me.------Create a Database tutorial data_test-----Create DATABASE Data_testGoUse Data_testGoCREATE TABLE Tb_testt

Is it possible to answer this question in just a few seconds? You may try to view the performance counters in Performance Monitor PerfMon. There are about 1000 counters with different names. You may ask: "Skipped Ghosted Records/sec" number of phantom Records Skipped per second) = 10. Is this value good or bad? The correct answer is that this value may not be important. However, some counters are really imp

In this article I would like to summarize the following SQL Server 2014 introduces a variety of amazing performance improvements!!Cache Pool Extension (buffer pools Extensions)The idea of a cache pool extension is simple: Store page files on very fast storage, such as SSD drives, to extend the cache pool. Cache pool extensions are very handy, and if you can't add

" began, and then check the "suo", and then find the word "rope", according to its page, Turn to the page where the word is located. Of course this requires that 1. All Chinese characters in the Xinhua dictionary are arranged in phonetic alphabet order. 2. The Xinhua dictionary has a phonetic lookup appendix in front of it. Clustered index is also the reason, 1. There is a "phonetic" list of all the data, that is, the index. 2. All data is arranged sequentially on the hard disk according to this

Label:I believe a lot of friends, whether it is to do development, architecture, or DBA, are often heard of the word "tuning". Talk about "tuning", may make a lot of technical staff heart passion, also may make a lot of people feel distressed, do not know how to start. Of course, there are many people who are dismissive of this, because not everyone does the project is very high performance requirements. In the mainstream of enterprise-level developme

20150500 Union All Select [Commitid] ,[Authorid] ,[CreatedDate] ,[Createddatekey] fromDb2.tdw.dbo.commits C with(NOLOCK)whereC.[Createddatekey] between 20150500 and 20150900 with Check OPTION; GO 2, query performance test Test1, using the basic table test, cost:16s Select Count (0) from dbo.commits_total C with (nolock) whereDay (c.[ createddate])=1 Test2, using partitioned view test, cost=136s, with Test1 there is a sign

worry about it, of course, the above scenario is not completely covered, or at least to explain part. The results we got above look at the execution time, now let's look at the two query execution plans.0 ) from sys.tables as T; 0 ) from sys.tables as T;The above may not be accurate, but also related to hardware configuration, it is possible to coalesce poor performance and IsNull. There should be no big difference in

The first time the data is accessed is much slower than the next access, because it reads the data from the disk and writes it to the buffer; Aggregate queries (Sum,count, etc.) and other queries that scan most tables or indexes require a lot of buffering and can adversely affect performance if it causes SQL Server to discard other data from the cache;

performance of the rapid decline.The original version is actually quite common, and performance is better than after the rewrite (in the case of a very long string). But there is also the problem that if the string is too long, the performance drops sharply.If there is really a string of more than 5W commas. This SQL

andselectmax(列)(@pageIndexint, --页索引@pageSizeint--页记录数)asbeginsetnocounton;declare @timediff datetimedeclare @sql nvarchar(500)select@timediff=Getdate()set@sql=‘select top ‘+str(@pageSize)+‘ * From tb_TestTable where(ID>(select max(id) From (select top ‘+str(@pageSize*@pageIndex)+‘ id From tb_TestTable order by ID) as TempTable)) order by ID‘execute(@sql)selectd

Extending a SQL Server environment across multiple systems can be said to be a difficult and complex project, involving partitioned databases, federation, and so on. So, when it comes to SQL Server scalability, most organizations prefer to take the approach of extending independent systems before trying to solve them.

Many times, the performance bottleneck of our server will be when querying the database, so it is very important to cache the database, then there is no way to implement the SQL Server database cache, when the data table is not updated, read from the cache, when there is an update, only read from the data table, The an

I. Indexed views For years, MicrosoftSQL Server has supported the creation of virtual tables called views. Typically, the main functions of these views are: Provides a security mechanism that restricts users to a dataset in one or more base tables. Provides a mechanism that allows developers to customize how users can view data stored in a base table in a logical way. The capabilities of the SQL

Original: SQL server-focus Inner JOIN and in performance analysis (14)ObjectiveIn this section we talk about the integration of integrated knowledge, we are in most tutorials or theoretical books are talking about which good, which performance is inferior to which performance