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Content with tag Performance Rss

   Items 1 to 20 of 94    Older >>
 

Performance Myths: Oversizing string columns

Aaron Bertrand shows a quick demo that illustrates why you should be very careful about oversizing varchar / nvarchar columns.  Read more...
By Additional Articles 2017/07/13 | Source: SQLPerformance.com | Category: performance
Rating:  Rate this |   Briefcase | 4,824 reads

Performance of OBJECT_NAME() & Co.

Read more...
By Thomas Franz 2017/07/10 | Category: performance
Rating: (not yet rated) |  Discuss |   Briefcase | 751 reads

Properly Persisted Computed Columns

Paul White walks through a new trace flag in SQL Server 2016 designed to yield better execution plans (and performance) for queries involving computed columns.  Read more...
By Additional Articles 2017/06/20 | Source: SQLPerformance.com | Category: trace flags
Rating: (not yet rated)  Rate this |   Briefcase | 3,972 reads

UNION ALL Optimization

Paul White digs into row goals as he explains some interesting and inconsistent behavior with UNION ALL queries in SQL Server.  Read more...
By Additional Articles 2017/06/13 | Source: SQLPerformance.com | Category: union all
Rating: (not yet rated)  Rate this |   Briefcase | 5,437 reads

Performance Myths : Truncate Can't Be Rolled Back

Derik Hammer sets out to disprove another pervasive performance myth : TRUNCATE is faster than DELETE because it isn't logged and can't be rolled back.  Read more...
By Additional Articles 2017/06/01 | Source: SQLPerformance.com | Category: performance
Rating:  Rate this |   Briefcase | 4,155 reads

Combining R and SQL Server to diagnose performance bottlenecks

Using clustering algorithms to analyse index usage data from SQL Server’s DMVs & simplify complex performance investigations.  Read more...
By Nick Burns 2017/05/29 (first published: 2015/12/07) | Source: SQLServerCentral.com | Category: performance
Rating: |  Discuss |   Briefcase | 9,016 reads

Performance Myths: Table variables are always in-memory

Guest author Derik Hammer dismisses the common myth that table variables perform better than temp tables because they are always in memory.  Read more...
By Additional Articles 2017/05/11 | Source: SQLPerformance.com | Category: performance
Rating: (not yet rated)  Rate this |   Briefcase | 5,257 reads

Harmful, Pervasive SQL Server Performance Myths

Aaron Bertrand begins a new series around disproving prevalent myths regarding SQL Server performance.  Read more...
By Additional Articles 2017/04/13 | Source: SQLPerformance.com | Category: performance
Rating: (not yet rated)  Rate this |   Briefcase | 4,285 reads

Understanding Graphical Execution Plans - Part 1: Explaining the Plan

Understanding execution plans is a good basic skill for all DBA's and SQL developers. Darren White gives us an overview of what execution plans are in SQL Server and how they are used.  Read more...
By Darren White 2017/03/10 (first published: 2014/02/18) | Source: SQLServerCentral.com | Category: execution plans
Rating: |  Discuss |   Briefcase | 29,479 reads

Finding the Worst Performing TSQL Statement

Greg Larsen explains how you can use Dynamic Management Objects and stored procedures to return your worst performing T-SQL statements.  Read more...
By Additional Articles 2017/03/06 | Source: Database Journal | Category: performance
Rating: (not yet rated)  Rate this |   Briefcase | 4,816 reads

Performance Dashboard Error: Could not find stored procedure

In this article, you will learn how to troubleshoot error when you try to launch the main Dashboard Report.  Read more...
By Ganapathi varma Chekuri 2017/02/27 | Source: SQLServerCentral.com | Category: sqlserver2008r2
Rating: |  Discuss |   Briefcase | 783 reads

Performance Surprises and Assumptions : GROUP BY vs. DISTINCT

Aaron Bertrand acknowledges that DISTINCT and GROUP BY are usually interchangeable, but shows there are cases where one performs better than the other.  Read more...
By Additional Articles 2017/02/23 | Source: SimpleTalk | Category: performance
Rating: (not yet rated)  Rate this |   Briefcase | 7,976 reads

SQL Server vs SQL Server v.Next

An introduction to the basics of current SQL Server vs v.Next Performance Testing.  Read more...
By Henrico Bekker 2017/02/15 | Source: SQLServerCentral.com | Category: vnext
Rating: |  Discuss |   Briefcase | 2,130 reads

Compression and its Effects on Performance

Erin Stellato takes a look at the new COMPRESS and DECOMPRESS functions, comparing their impact on space and performance to traditional data compression.  Read more...
By Additional Articles 2017/02/15 | Source: SQLPerformance.com | Category: compression
Rating: (not yet rated)  Rate this |   Briefcase | 5,985 reads

How Incorrect SQL Server Table Statistic Estimates Can Cause Slow Query Execution

Ben Snaidero explains that if you are updating your SQL Server table statistics nightly, but still seeing occasional poor performance with some of the queries being executed against my database, statistics could be the issue.  Read more...
By Additional Articles 2017/02/09 | Source: MSSQLTips.com | Category: performance
Rating: (not yet rated)  Rate this |   Briefcase | 3,790 reads

Performance of the SQL MERGE vs. INSERT/UPDATE

The SQL MERGE statement offers convenience, safety and elegance, but how does it perform compared to other methods?  Read more...
By Dwain Camps 2017/02/03 (first published: 2013/10/28) | Source: SQLServerCentral.com | Category: merge
Rating: |  Discuss |   Briefcase | 36,982 reads

Disconnecting SQL Server connections after query execution

One way to improve SQL Server performance is to use as few resources as possible. In this post Rahul Mehta demonstrates how you can do this by disconnecting queries post-execution with a simple change in SSMS.  Read more...
By Additional Articles 2016/12/21 | Source: MSSQLTips.com | Category: performance
Rating: (not yet rated)  Rate this |   Briefcase | 5,289 reads

Query Performance comparison between instances

Execute at source, and will generate an output with TSQL commands to create temp tables filled with top 50 long lasting queries from all databases. Then execute output at destination and will do the same and show comparison of matching queries!!   Read more...
By Rodrigo Acosta 2016/12/19 | Source: SQLServerCentral.com | Category: query
Rating: |  Discuss |   Briefcase | 595 reads

Better Coding, More Savings

The way we write code impacts our users, but it can also impact our wallet, especially in cloud computing. Steve Jones wonders how many people bother to profile and test their code.  Read more...
By Steve Jones 2016/12/19 | Source: SQLServerCentral.com | Category: editorial
Rating: |  Discuss |   Briefcase | 343 reads

5 Advantages of Load Balancing For IT Companies

As an IT company, it is crucial that you maintain uptime and monitor the performance of various processes. By making database load balancing a key element, you can ensure that your processes and websites run smoothly. Tony Branson explains.  Read more...
By Additional Articles 2016/11/24 | Source: Database Journal | Category: performance
Rating: (not yet rated)  Rate this |   Briefcase | 5,415 reads
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