SQL Performance

APRIL 10, 2019

I posted a suggestion to improve SQL Server by adding support for RPR in T-SQL , but I was quite limited in the space that I had to provide the feedback. STOCK1 2019-02-12 150.00 STOCK1 2019-02-13 151.00 STOCK1 2019-02-14 148.00 STOCK1 2019-02-15 146.00 STOCK1 2019-02-18 142.00 STOCK1 2019-02-19 144.00

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C++ Servers Virtualization Code 73

SQL Performance

DECEMBER 9, 2020

I’ll present the performance tests that I’ve done with my solution. What’s the best performing solution that you can conjure? To evaluate the performance of your solution and compare it with others, I’ll test it with the range 1 through 100,000,000, with Discard results after execution enabled in SSMS. So, the challenge is on!

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C++ Servers Testing Processing 61

SQL Performance

FEBRUARY 12, 2020

Curiously, SQL Server's query processor already supports an internal comparison operator IS, which uses the same semantics as the desired IS operator I described here. Here's the complete solution code: WITH C AS. ( 11063 2019-05-06 11067 2019-05-06 11069 2019-05-06. Figure 1: Plan for Query 1.

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C++ Code Servers Database 120

SQL Performance

MAY 11, 2022

By following some basic tips you can sometimes reduce the number of explicit sort operators, which can, of course, have a major impact on the performance of the query. I ran all the examples on SQL Server ® 2019 Developer, where batch-mode on rowstore is available. Environment for Demos. So, why does the plan have four sorts?

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C++ Database Servers Code 133

The Netflix TechBlog

APRIL 17, 2019

Intel and Netflix announced their collaboration on a software video encoder implementation called SVT-AV1 on April 8, 2019. Scalable Video Technology (SVT) is Intel’s open source framework that provides high-performance software video encoding libraries for developers of visual cloud technologies. What is SVT-AV1?

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Open Source Scalability Speed Efficiency 166

SQL Performance

DECEMBER 11, 2019

As an example, suppose that you need to query the Sales.Orders table in the TSQLV5 sample database, and return orders that were shipped on January 2 nd , 2019. WHERE shippeddate = '20190102' ; It's clear that the filter predicate evaluates to TRUE for rows where the shipped date is January 2 nd , 2019, and that those rows should be returned.

Best Practices 117

Best Practices C++ Database Code 117

SQL Performance

OCTOBER 9, 2019

The EOMONTH function was introduced in SQL Server 2012. WHERE orderdate = EOMONTH ( DATEADD ( month , - 1 , SYSDATETIME ( ) ) ) ; Note that if you actually run this query in the TSQLV5 sample database you will get an empty result since the last order date recorded in the table is May 6 th , 2019.

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C++ Database Servers Code 111

Testsigma

APRIL 23, 2021

Simform (as of 2019) stated that an average user has at least 40 apps installed on their phones while millennials have around 67 apps. To ensure our users get a seamless experience across any device — we perform mobile app testing. . So, there’s a solid reason why mobile app testing is a crucial step in any app development process.

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Testing Tools Mobile Testing Open Source 86

SQL Performance

JULY 1, 2019

The results are technically non-deterministic since SQL Server could validly return any one of the rows in each group. Nevertheless, if you run this query yourself, you are quite likely to see the same result I do: The execution plan depends on the version of SQL Server used, and does not depend on database compatibility level.

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C++ Servers Database Performance 58

SQL Performance

AUGUST 12, 2020

You can find it in the documentation of Microsoft SQL Server and Azure SQL Database. T-SQL supports it starting with SQL Server 2005. Furthermore, it’s important not to confuse the use of table expressions and temporary tables, but that’s a performance related discussion that I will address in a future article. orderyear , CUR.

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C++ Code Design Database 140

Scalegrid

OCTOBER 7, 2019

As this open source database continues to pull new users from expensive commercial database management systems like Oracle, DB2 and SQL Server, organizations are adopting new approaches and evolving their own to maintain the exceptional performance of their SQL deployments. Java #Python #C Click To Tweet.

Strategy 182

Strategy Cloud Java Open Source 182

SQL Performance

OCTOBER 14, 2020

I explained that when SQL Server optimizes a query involving derived tables, it applies transformation rules to the initial tree of logical operators produced by the parser, possibly shifting things around across what were originally table expression boundaries. Here’s the attempted solution using a CTE: WITH C AS. ( FROM Sales.

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C++ Servers Code Efficiency 140

SQL Server According to Bob

DECEMBER 18, 2018

SQL Server relies on Forced-Unit-Access (Fua) I/O subsystem capabilities to provide data durability, detailed in the following documents: SQL Server 2000 I/O Basic and SQL Server I/O Basics, Chapter 2. Be sure to deploy SQL Server 2017 CU6 or newer for best data durability and performance results. “.

Servers 90

Servers Media Cache Storage 90

SQL Performance

OCTOBER 13, 2021

As you can see in Figure 1, thanks to the fact that the function got inlined, SQL Server was able to create an optimal plan that interacts directly with the underlying base table’s indexes. In our case, the plan performs a seek in the supporting index you created earlier. Customers AS C CROSS APPLY Sales. SELECT TOP (@n).WHERE

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Cache Strategy C++ Code 144

SQL Performance

FEBRUARY 10, 2021

Last month I used the following code to test the function's performance with 100M rows, after enabling the Discard results after execution in SSMS to suppress returning the output rows: SELECT n FROM dbo. The plans for both queries—the one without ordering and the one with ordering are the same, so performance tends to be similar.

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C++ Servers Testing Code 124

SQL Performance

MAY 6, 2021

This is the fourth part in a five-part series taking a deep dive into the way SQL Server row mode parallel plans start executing. Part 3 started the query scan, performed some early phase processing, and started the first additional parallel tasks in branch C. Branch C execution details. Inspecting the new parallel tasks.

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C++ Azure Servers Processing 95

SQL Performance

OCTOBER 14, 2020

I explained that when SQL Server optimizes a query involving derived tables, it applies transformation rules to the initial tree of logical operators produced by the parser, possibly shifting things around across what were originally table expression boundaries. Here’s the attempted solution using a CTE: WITH C AS. ( FROM Sales.

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C++ Servers Code Efficiency 52

Smashing Magazine

JULY 16, 2019

2019-07-16T14:30:59+02:00. 2019-07-16T14:35:52+00:00. Why hire someone to work at 1–2 minutes per query when you can get a program to perform a query automatically every few seconds? When building our scrapers, we also need to make sure that we do not overwhelm a server with requests that it can’t handle.

Scalability 87

Scalability Website C++ Servers 87

HammerDB

JUNE 27, 2022

It enables the user to measure database performance and make comparative judgements about database hardware and software. The Transaction Processing Performance Council (TPC) was founded to bring standards to database benchmarking, and the history of the TPC can be found here. What is HammerDB? Why HammerDB was developed.

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Benchmarking Open Source C++ Cache 62

Dynatrace

APRIL 5, 2021

Azure is a large and growing cloud computing ecosystem that empowers its users to access databases, launch virtual servers, create websites or mobile applications, run a Kubernetes cluster, and train machine learning models, to name a few examples. The growth of Azure cloud computing. Making the best use of Azure Functions.

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Azure Serverless IoT Lambda 137

Scalegrid

AUGUST 15, 2019

Read on to find out which is the best MongoDB GUI for you, updated for 2019, that contain these key features: A good visual editor to write and edit queries faster. Should have an excellent way to measure server and query performance. They have almost every feature mentioned above and perform very well in each sector.

Database 40

Database Servers Monitoring Availability 40

Tasktop

OCTOBER 16, 2019

That test was using one of our components to connect to a server, post some data, retrieve the data and assert that the new data is present. We run a lot of similar tests against myriad servers and even more versions of the aforementioned. Are we somehow hitting some edge case with certain unicode characters coming from the server?

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C++ Servers Testing Infrastructure 9

SQL Performance

NOVEMBER 13, 2019

Never mind the likelihood for this to happen in practice in SQL Server; if I run the query again, theoretically, the row with id 2 could be assigned with row number 3 and the row with id 11 could be assigned with row number 2. So apparently the window order clause is mandatory for the ROW_NUMBER function in SQL Server.

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Servers C++ Storage Performance 104

SQL Server According to Bob

MAY 19, 2019

SQL Server will ship Azure SQL Database Edge: [link]. With the announcement I can tell you more about one of the things we have been working on; SQL Server running on IoT Edge and Developer machines in under 500MB of memory. The effort focuses attention on memory usage and disk space requirements of SQL Server.

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IoT Servers Development Cache 61

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. A quick check of basic performance statistics showed over 30% higher CPU consumption. How would you _time_ time? us on Ubuntu.

Speed 126

Speed Java AWS Virtualization 126

HammerDB

OCTOBER 12, 2018

This post complements the previous best practice guides this time with the focus on MySQL and MariaDB and achieving top levels of performance with the HammerDB MySQL TPC-C test. As is exactly the same with PostgreSQL for system choice a 2 socket system is optimal for MySQL OLTP performance. order by c.

Best Practices 40

Best Practices Scalability Performance C++ 40

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. A quick check of basic performance statistics showed over 30% higher CPU consumption. How would you time time?

Speed 52

Speed Java AWS Virtualization 52

Smashing Magazine

APRIL 9, 2019

2019-04-09T12:30:59+02:00. 2019-04-29T18:34:58+00:00. Most sites were all hosted on a single physical server somewhere on our own hosting infrastructure, and it was the server we thought about defending when it came to security best practices. file hosted as part of their own website on their own server.

Website 58

Website Servers Code Best Practices 58

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. A quick check of basic performance statistics showed over 30% higher CPU consumption. How would you _time_ time? us on Ubuntu.

Speed 40

Speed Java AWS Virtualization 40

Enprowess

SEPTEMBER 7, 2021

Software Developers got to use JavaScript CLI tools to create the back-end part of web applications or server-side. allows creating web application’s server-side or back-end components. is a server-side, open-source, JavaScript runtime environment that allows developers to write JavaScript on the client and the server-side.

Open Source 52

Open Source Virtualization Programming Servers 52

SQL Performance

SEPTEMBER 25, 2020

However, the problem still exists in SQL Server 2019. a AS /* comment here because -- chaos */ int = 5 , @b AS varchar ( 64 ) = 'AS = /* BEGIN @a, int = 7 */ ' 'blat' '' , @c AS int = -- 12. We have the object and schema name together without having to perform any additional iteration or concatenation.

Code 42

Code C++ Database Servers 42

Smashing Magazine

OCTOBER 26, 2018

2019-04-29T18:34:58+00:00. In recent years, the industry thankfully started paying more attention to performance. As a result, website performance can suffer. Improving performance with the decoupled JSON approach. Improving Performance With The Decoupled JSON Approach. Denis Žoljom. 2018-10-26T13:45:46+02:00.

Cache 78

Cache Website Speed Database 78

The Morning Paper

SEPTEMBER 12, 2019

The Apache MADLib project is still going strong, and the recent (July 2019) 1.16 Clearly the chosen decomposition can have a big impact on the resulting query performance. The implementations require both SQL and also some UDFs written in C++. release even includes some support for deep learning. optimal join orderings).

Network 44

Network Database Programming Hardware 44

Smashing Magazine

JANUARY 21, 2019

2019-01-21T13:00:21+01:00. 2019-04-29T18:34:58+00:00. This article was updated on January 31, 2019 to react to readers’ feedback. An API is the communication channel for an application to load data from the server. Leonardo Losoviz. Large preview ). This JSON object is already the response from the component-based API.

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Social Media Database Media Website 64

Scalegrid

JULY 13, 2020

Recognized as the fastest growing database by popularity, PostgreSQL was named the DBMS of the year in both 2018 and 2017 by DB-Engines, and continues to grow in popularity in 2019. There are a wide range of tools and extensions for every conceivable scenario, like performance profiling, auditing, etc. Objective C. SolarisUnix.

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Open Source Tuning C++ Database 244

Smashing Magazine

JANUARY 7, 2019

Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]. Front-End Performance Checklist 2019 [PDF, Apple Pages, MS Word]. 2019-01-07T12:00:13+00:00. 2019-04-29T18:34:58+00:00. Web performance is a tricky beast, isn’t it? Back in the day, performance was often a mere afterthought.

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Performance Cache Metrics Network 104

Smashing Magazine

JANUARY 11, 2021

Front-End Performance Checklist 2021. Front-End Performance Checklist 2021. This guide has been kindly supported by our friends at LogRocket , a service that combines frontend performance monitoring , session replay, and product analytics to help you build better customer experiences. Web performance is a tricky beast, isn’t it?

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Performance Cache Media Metrics 145