Diagnose and resolve latch contention on SQL Server
This guide describes how to identify and resolve latch contention issues observed when running SQL Server applications on high concurrency systems with certain workloads.
2021-08-30
Performance and Tuning
More on Column Choice and Order for Multi-column Non-Clustered Indexes
In the last year I’ve published articles on indexes to include Indexes: When Column Selectivity Is Not Always A Requirement – SQLServerCentral and Query Optimizer Suggests Wrong Index and Query Plan -- Why? – SQLServerCentral. This article is a continuation of just how the optimizer interacts with the index wizard. We’ve all heard and read […]
2021-07-07
1,977 reads
Performance Tuning Means 3 Things
Brent Ozar discusses performance tuning and how From the outside it looks more complicated than it is, but at the end of the day, it always comes back to just 3 knobs and knowing which ones you can turn.
2020-02-07
A Self-Tuning Fill Factor Technique for SQL Server – Part 2
Introduction Fill Factor is a parameter most of us have ignored because there is no definitive way to calculate what the correct value should be. Part 1 of this series describes a new technique to dynamically determine index fill factors for all indexes within a database. Part 2 covers an analysis of the data collection […]
2019-08-27
3,289 reads
Waits and Queues
This week Steve is wondering if you know how to use waits and queues for troubleshooting.
2019-08-23
387 reads
A Self-Tuning Fill Factor Technique for SQL Server – Part 1
Introduction So what’s all the fuss about Fill Factor? It is a SQL Server parameter I’ve ignored for 20+ years. The main reason was/is I’ve had no idea about what value to use. There is just no documented definitive guidance. Back in April at SQL Saturday #830 - Colorado Springs, I attended two sessions by […]
2019-08-20
6,762 reads
Are your CPU-intensive queries running slowly? Check your VM type.
When you build a VM for SQL Server in Amazon EC2, Azure VMs, or Google Compute Engine, it’s all too easy to overlook the CPU speeds that you’re getting.
2019-05-03
A Brief History of Deadlock and Modern Approach of Resolution
Deadlocks have been constant troublemakers for database professionals for years. They seem to show up from nowhere and keep on happening again and again. Pinal Dave provides some oversight.
2019-04-05
SQL Server Logical Reads – What do they really tell us?
SQL Server trace, the most common tool DBAs use to evaluate query performance, provides the ‘logical reads’ counter on which many DBAs rely for evaluating a query’s I/O performance. In this article, we will examine this counter’s true meaning and provide examples that prove it can sometimes be quite misleading
2019-01-15
3,258 reads
SQL Server Logical Reads – What do they really tell us?
In this article, we will examine this counter’s true meaning and provide examples that prove it can sometimes be quite misleading
2018-12-10
2,593 reads
Blogs
Daily Coping 21 Sep 2021
By Steve Jones
I started to add a daily coping tip to the SQLServerCentral newsletter and to...
#PowershellBasics: Bulk insert.
In my last post I talked about invoke-sqlcmd. It’s a nice easy way to...
Lambda Architecture in data systems and possible meaning of this name
By Rayis Imayev
(2021-Sep-21) There is one scene in "The Core" movie that I really like when two geophysicists...
Forums
Difference between SaaS and web application?
I'm currently interested in self-hosting and I recognized that mostly it's about alternatives for...
Reducing Temp Table Scans when joining two temp tables using OR conditions
Hi all. I have also posted this on DBA Stack Exchange, but I'm posting...
question about username dbo
I have been asked to revoke access from a few developers in SQL Server...
Ask SSC