restrict sql server memory usage

SQL Server Configuration Manager (for short, Configuration Manager) contains the SQL Server service, SQL Server network configuration, and SQL Native client configuration 3 Tools for da

Label:Reprinted from: http://www.lmwlove.com/ac/ID943 Usage of ROWCOUNT:The function of rowcount is to restrict the subsequent SQL to stop processing after returning the specified number of rows, such as the following example,SET ROWCOUNT 10SELECT * FROM Table ASuch a query will only return the first 10 data in table A. It acts as a "select top * from Table a".

SQL Server user-defined Function usage, sqlserverfunction I. FUNCTION:In sqlserver2008, there are 3 custom functions: scalar functions, inline table valued functions, and multi-statement table valued functions. First, summarize the similarities and differences of their syntax: Similarities:1. the creation definition is the same: a, create function F_NAME (type of

Insert into dbo. TableA (id,name) Select1, ' AA ' Insert into dbo. TableA (id,name) Select2, ' BB ' Suggested wording : Insert into dbo. TableA (id,name) Select1, ' AA ' Unionall Select2, ' BB ' Suggested notation 2: Insert into Dbo.tablea (id,name) Values (1, ' AA '), (2, ' BBB ') Such as: General wording : UpdateaSetA.userno=A.userno+1 fromdbo. TableA aWhereA.username=' Zhang San 'Go UpdateaSetA.userno=A.userno+1 fromdbo. TableA aWhereA.username=' John Doe ' Suggested wording Update a

Start by explaining which parts of SQL Server memory footprint are made up of. The memory consumed by SQL Server consists primarily of three parts: data caching (database buffer), execution caching (Procedure cache), and

To improve SQL statements, many people do not know how SQL statements are executed in SQL Server. They are worried that SQL statements they write will be misunderstood by SQL Server. Fo

PROCEDURE usp_insertproductionlocation @TVP locationtabletype READONLY as SET NOCOUNT On INSERT into [AdventureWorks]. [Production]. [Location] ([Name], [costrate], [availability], [ModifiedDate]) SELECT *, 0, GETDATE () from @TVP; go/* declares a variable to reference the type */declare @LocationTVP as locationtabletype;/* Add data to the table variable. */insert into @Location TVP (LocationName, costrate) SELECT [Name], 0.00 from [AdventureWorks]. [Person]. [stateprovince];/*

table, you can set fillfactor to 100. (6) When selecting the index key, try to select the columns that use the small data type as the key so that each index page can accommodate as many index keys and pointers as possible, you can minimize the number of index pages that must be traversed by a query. In addition, try to use an integer as the key value, because it can provide faster access than any data type. 5. Index Maintenance As mentioned above, some inappropriate indexes affect the perf

frequently referenced queries as the leading column, if possible, key queries may be overwritten. (4) If you know that all values of the index key are unique, make sure that the index is defined as a unique index. (5) When creating an index on a table with frequent insert operations, use fillfactor to reduce page splitting and increase concurrency to reduce the occurrence of deadlocks. If you create an index on a read-only table, you can set fillfactor to 100. (6) When selecting the index

, @ RowCount indicates the number of affected rows. For example, let's look at the statement for creating table variables: DECLARE @ News Table(News_id int not null,NewsTitle varchar (100 ),NewsContent varchar (2000 ),NewsDateTime datetime) You can select, insert, update, and delete SQL statements to compare temporary tables and table variables. Their differences are mainly reflected in the following: 1) Table variables are stored in the

SQL Server Index Structure and usage (III)Author: freedk I. An in-depth understanding of the index structureIi. Improve SQL statements General paging display and storage process for small data volumes and massive data Creating a Web application requires paging. This problem is very common in database processing. The ty

method 2.Some tracing tags that may be required in the production environment Trace Flag 610Reduce log generation. If you use a lot of basic best practice for logs, such as only one log file, an appropriate number of VLF files, and independent storage, if the log is too large, consider using this trace mark. References: http://msdn.microsoft.com/en-us/library/dd425070.aspxHttp://blogs.msdn.com/ B /sqlserverstorageengine/archive/2008/10/24/new-update-on-minimal-logging-for-

even 0 milliseconds in the case of large data volumes or small data volumes. However, the query speed for narrowing the range by date segments is no slower than the original query speed. Clustered index is so important and precious, so I have summarized that clustered index must be built on: 1. The most frequently used field to narrow the query scope; 2. The most frequently used field to be sorted. Conclusion This article brings together my recent experiences in using databases, and is a

, technology, and police business and the Golden Shield Project.Finally, it should be noted that during the experiment, I found that the biggest impact on the database speed is not the memory size, but the CPU. When I tried it on my P4 2.4 machine, I checked "Resource Manager". The CPU usage often continued to reach 100%, but the memory

, technology, and police business and the Golden Shield Project.Finally, it should be noted that during the experiment, I found that the biggest impact on the database speed is not the memory size, but the CPU. When I tried it on my P4 2.4 machine, I checked "Resource Manager". The CPU usage often continued to reach 100%, but the memory

(3 FObjectType4) include ([Fuserid], [ Faccesstype], [Faccessmask]) with (Statistics_norecompute = off, Ignore_dup_key = off, Allow_row_locks = ON, Allow_page_lo CKS = ON) on [primary]5 GO6 7 Drop index IX_T_ACCESSCONTROL_F4 on T_accesscontrolCPU usage back to normalTrace template and trace file download, use SQL2008R2 version: files.cnblogs.com/lyhabc/trace Template and Trace.rarSummarizeFrom a number of historical experience, if the CPU load co

SQL Server's memory management is a huge topic that involves a number of concepts and techniques, such as the common Plan Cache, Buffer Pool, memory clerks, and so on. This article is only glimpse, which describes common memory management-related concepts.Before understanding memor