sql server performance monitor counters

Original address: http://www.sqlpassion.at/archive/2014/04/08/improving-query-performance-by-using-correct-search-arguments/ Today's article gives you a talk about a specific performance issue with indexing on SQL Server. Problem Look at the simple query statement below, you may have seen it hundreds of times

existing event classes are displayed on the right. For performance optimization, we do not need security review or session information. Click the delete button: Switch to the third tab page, and the data column here is enough by default. Of course, if you are not pleasing to the eye, you can delete the appname/NT username and so on. On the last tab page, we need to block the event ID generated by the system: Check the excluded System ID, for examp

ExecuteScalar method to retrieve a single value (for example, an ID number) from the database ). This operation requires less code than executing the operations required to generate a single value for the returned data using the ExecuteReader method.You only need to update the data using ExecuteNonQuery. Use ExecuteScalar to query a single value. Ii. SqlDataRead and Dataset SelectionSqldataread advantages: fast data reading. If you do not need to process the returned data in large quantities, w

Original: SQL Server performance optimization included columnsSQL Server performance optimization included columnsGuide: Data number optimization query has always been a relatively hot topic, niche in this area can only be regarded as an introductory student. ThisOh, God, we

1. The problem system has a module that needs to query data in the Oracle database. Currently, this is achieved by creating a linked server. The current query statement of limit is a simple 1. The problem system has a module that needs to query data in the Oracle database. Currently, this is achieved by creating a linked server. SQL

In our OLAP implementation, SQL is extremely complex and uses a lot of temporary tables. During the installation of tempdb, the local disk path for SQL Server installation is selected by default, and no disk array is used. When learning PostgreSQL, we found that many experts suggest placing the temporary tablespace on SSD or using RAID0 + 1 to increase the write

poorly run applications outweigh the investment in human, program, and technology using reliable load testing methods. Therefore, I would like to provide the following list of load tests for your application, which will be a magic bullet to prevent your SQL Server performance tuning problem. Checklist: Load test--sql

How do you improve the performance of your SQL Server database? The author thinks that we should follow the order from outside to inside to improve the running performance of the database. The following figure: First layer: network environment. To the enterprise to meet the database reflection speed is relatively s

SQL Server uses cursors to deal with the extremely competitive performance of Tempdb-DBA issues-required by programmers, tempdb-dba Competition in SQL Server tempdb allocation is a common issue for DBAs. Almost all DBAs now know how to create several more files to solve/alle

can avoid Key lookup is perfect, let's revise non-clustered index to include it in the index with the Include keyword His fields are:[SQL] DROP INDEX idx_non_clust_salesorddetaildemo_modifieddate on salesorddetaildemo GO CREATE nonclustered INDEX idx_non_clust_salesorddetaildemo_modifieddate on salesorddetaildemo (ModifiedDate) INCLUDE ( ProductID, UnitPrice ) GO --Clear the cache, only for the development environment! DB

In SQL Server, the Inner Join and Outer Join operations between common tables are performed by the execution engine based on the selected columns and whether the data has an index, the selected data is selectively converted to one of the Loop Join, Merge Join, and Hash Join physical connections. Understanding these three physical connections is the basis for solving per