identify poor performance in sql server

SQL Server focuses on optimization of Stored Procedure performance, data compression, and page compression to improve IO performance (I ). Preface The SQL Server basic series is not over yet, And the last point is not written, and

Windows Server 2008 R2 en enterprise 64bitSQL Server 2008 R2 en enterprise 64bit Symptom: the performance counters related to SQL Server are not displayed in Performance Monitor. Solution: Rebuilding the counters:CD c: \ window

. SQL Server Execution Time: CPU time = 17188 milliseconds, time consuming = 17261 milliseconds. (1 rows affected) SQL Server Execution Time: CPU time = 0 milliseconds, time consuming = 0 milliseconds. */ Comparing 2000 and 2008 can be found 2008 CPU time is significantly higher than 2000, 2008 work

each returned row. At this rate, scanning the entire table becomes more efficient. This is another reason to limit the size of the result set, or to find large results with a clustered index. Do not equate using indexes with good performance, and vice versa. If using an index always produces the best performance, the optimizer's work is simply too simple, as long as any available index is used. The realit

very deep, that is, more and more practical problems, have to have theoretical knowledge to support,But it is often theoretically said that the situation does not appear frequently or even if there is no attention, there is time to neglect some theoretical knowledge.For the problems encountered, if you really want to find out, still have some theoretical knowledge to do the groundwork. Many times, often after encountering problems, recalled once good seems to have seen this aspect of theoretica

Tags: Data Warehouse res warehouse IMA Misc SYS cell nbsp HighlightTo configure the Data collector: 1. Create a login and map roles 2. Configuring the Management Data Warehouse 3. Create collection sets, collection items----msdb data store sp_syscollector_create ... 4. Automatically configure the related job Specific steps: After creating the diagram: To configure Data collection: The refresh looks like this: The method created: Use msdb go declare @collectionsetid int --return val

1. Select the most efficient table name order (valid only in the Rule-based optimizer) The SQL Server parser processes the table names in the FROM clause in Right-to-left order, therefore, the last table in the FROM clause (driving table) is processed first, and in the case where multiple tables are included in the FROM clause, the table with the fewest number of records must be selected as the underlying

is not all on the second server:This shows: Distributed view can effectively solve the system performance problems, the large table different record range---on different servers, and then through the view of the table operation, effective balance server load trafficSplit up access to the boosted data:Placement of data:1. Principles of Data placement:1. Create filegroups on different powerless disks or raid

Designing an application system does not seem difficult, but it is not easy to optimize the system performance. In the development of tools, database design, should There are multiple options for application structure, query design, and interface selection, depending on the specific application requirements and the skills of the development team. This document uses SQL