2015-09-21
1,640 reads
Performance
Analyzing I/O Performance for SQL Server
Inadequate storage is one of the most common bottlenecks seen in subsystem performance. There are a number of reasons for poor storage performance, but measuring it and understanding what needs to be measured and monitored is always a useful exercise.
2015-07-21
5,049 reads
Query Performance Report
The procedure created by this script rolls up the collected query execution statistics and groups them daily by the plan hash value.
2016-01-20 (first published: 2015-05-13)
5,361 reads
SQL Server 2014 Checklist for Performance
A checklist to help optimize the performance of SQL Server
2014-12-29
8,644 reads
2014-12-17
1,932 reads
Using DBCC DROPCLEANBUFFERS When Testing Performance
Over the years I've had many discussions with other SQL Server Database Administrators as to whether or not you should have the database buffer pool loaded with data pages or empty when testing queries for performance. This tip will take a look at the effects on query performance for both cases by using the DBCC DROPCLEANBUFFERS statement to empty the buffer pool.
2014-06-20
8,763 reads
SQL Server CPU Usage History Histogram
Returns a summary of CPU usage by SQL Server over the last 4 hours (default).
Using the sample values collected in the dm_os_ring_buffers dmv, this query will show CPU usage by the SQL Server process for the last for hours even if you have no other benchmarking activities in place on your server yet.
2015-09-18 (first published: 2014-05-14)
5,365 reads
2014-05-01
1,634 reads
2014-01-29
1,637 reads
2013-06-25 (first published: 2013-06-03)
1,538 reads
Blogs
Redgate Summit Comes to the Windy City
By Steve Jones
I love Chicago. I went to visit three times in 2023: a Redgate event,...
Non-Functional Requirements
By Brian Kelley
I have found that non-functional requirements (NFRs) can be hard to define for a...
Techorama 2024 – Slides
You can find the slidedeck for my Techorama session “Microsoft Fabric for Dummies” on...
Forums
Clear Trace - Asking for SQL Server 2008
Hi, I have SQL Server 2019 installed and when go the Clear Trace database...
get all txt files $filenameAndPath = code please help
Hello I need to get txt files from directory and send email, when I...
Always on Availability groups cluster question
Hello, I have a question regarding Availability group server architecture. A little background: We...
Question of the Day
The "ORDER BY" clause behavior
Let’s consider the following script that can be executed without any error on both SQL Sever and PostgreSQL. We define the table t1 in which we insert three records:
create table t1 (id int primary key, city varchar(50)); insert into t1 values (1, 'Rome'), (2, 'New York'), (3, NULL);If we execute the following query, how will the records be sorted in both environments?
select city from t1 order by city;See possible answers