SQL Performance

AUGUST 12, 2020

Customers WITH ( SERIALIZABLE ) ; The potential for ambiguity is when you have an unterminated statement preceding a CTE definition, in which case the parser might not be able to tell whether the WITH clause belongs to the first or second statement. Here’s an example demonstrating this: SELECT custid , country FROM Sales.

C++ 140

C++ Code Design Database 140

Dynatrace

NOVEMBER 8, 2021

Organizations use APM to ensure system availability, optimize service performance and response times, and improve user experiences. G2 Research includes a clear definition of APM in its Grid Report for Application Performance Monitoring for Spring 2021. ” — Christopher C, Platform Manager at an enterprise.

Artificial Intelligence 246

Artificial Intelligence Monitoring Infrastructure Cloud 246

SQL Performance

MAY 24, 2022

This clause is now available in Azure SQL Database and SQL Server 2022, provided you use database compatibility level 160 or higher. For example, the following query is valid since the window name definitions aren’t cyclic: SELECT 'This is valid'. As an example, the following query is invalid for this reason: WITH C AS. (

Servers 145

Servers C++ Code Database 145

SQL Performance

MAY 13, 2020

As a result, in the same level of nesting, column aliases that you define in the SELECT clause are only available to the ORDER BY clause. They are not available to the rest of the query clauses. Here's the standard's definition for derived tables in the general sense: 4.15.3 C is what's known as a range variable.

C++ 143

C++ Code Design Servers 143

The Netflix TechBlog

SEPTEMBER 10, 2019

New XP architecture: Systems highlighted in red are introspectable and contributable by data scientists Getting data with Metrics Repo Metrics Repo is an in-house Python framework where users define programmatically generated SQL queries and metric definitions. It centralizes metrics definitions which used to be scattered across many teams.

Metrics 221

Metrics Architecture Infrastructure Innovation 221

The Netflix TechBlog

MARCH 2, 2021

David Cameron (Studio Production) [David C.] My academic credentials definitely helped on the technical side. The tooling here is amazing, which made it easy for me to make my models available at scale across the company. What best prepared you for your current role at Netflix? Mihir Tendulkar (Payments) [Mihir T.]

Analytics 216

Analytics C++ Innovation Engineering 216

Percona

APRIL 10, 2023

In this blog post, I’m going to present a new functionality that is available in MyDumper and will be available in the next release: we added the possibility to build random data based on a format that the user defines. Masquerade was one of these features, but it was only for integer and UUID values. How does it work?

Testing 124

Testing C++ Open Source Database 124

Sutter's Mill

NOVEMBER 24, 2024

On Saturday, the ISO C++ committee completed the third-last design meeting of C++26, held in Wrocaw, Poland. There are just two meetings left before the C++26 feature freeze in June 2025, and C++26 is on track to be completed two more meetings after that in early 2026. is the nutshell synopsis. Thank you, Hana!

C++ 62

C++ Code Education Design 62

Percona

NOVEMBER 1, 2023

version, like this: ANALYZE TABLE removes the table from the table definition cache, which requires a flush lock. This makes the query wait for any long-running queries to finish but also can trigger cascading waiting for other incoming requests. In short, ANALYZE could lead to nasty stalls in busy production environments.

Servers 117

Servers Database Cache C++ 117

The Netflix TechBlog

MARCH 25, 2019

In the rest of this blog, we will a) touch on the complexity of Netflix cloud landscape, b) discuss lineage design goals, ingestion architecture and the corresponding data model, c) share the challenges we faced and the learnings we picked up along the way, and d) close it out with “what’s next” on this journey.

Infrastructure 225

Infrastructure Big Data Transportation Architecture 225

All Things Distributed

DECEMBER 1, 2016

Today, we're making available broad new services which that let builders prepare and operate their applications more quickly and efficiently, and respond to changes in both their business and their operating environment, swiftly. We also added C# support for AWS Lambda.

AWS 136

AWS Development Lambda Open Source 136

SQL Performance

FEBRUARY 10, 2021

BatchMe ( col1 INT NOT NULL , INDEX idx_cs CLUSTERED COLUMNSTORE ) ; And here’s the code with the definition of the dbo.GetNumsAlanCharlieItzikBatch function: CREATE OR ALTER FUNCTION dbo. But this option is available only starting with SQL Server 2019, which introduced scalar UDF inlining. L0 AS ( SELECT 1 AS c.

C++ 124

C++ Servers Testing Code 124

Sutter's Mill

MAY 1, 2023

Simple, mathematically safe, and efficient chained comparisons ( commit ) P0515 “Consistent comparison” (aka “spaceship”) was the first feature derived from this Cpp2 work to be adopted into the ISO Standard for C++, in C++20. Thank you again to everyone who helped land this Cpp2 feature in the ISO C++ Standard.

C++ 97

C++ Virtualization Lambda Code 97

SQL Performance

JULY 13, 2022

But sometimes a tool you need isn’t available, and you have to figure out a solution without it. Sometimes, you need to solve a T-SQL querying task, and you know the natural tool to solve it is a feature that’s part of the SQL standard but isn’t available in T-SQL. L0 AS ( SELECT 1 AS c.

C++ 112

C++ Code Azure Database 112

CSS Wizardry

APRIL 25, 2019

I don’t think this article is definitive or gospel. The Head of Tech likely reports into C-level staff, so they’ll sit pretty close to the business, but might not have as much hands-on technical knowledge as a day-to-day engineer. Why Is This Position Available? Disclaimer. I don’t claim to be an authority on interviewing.

Code 201

Code Engineering Design C++ 201

Percona

OCTOBER 17, 2023

The dynamic allocation might have flaws, but it’s definitely a good addition. available only for Atlas users) , that can not be modified anymore; That change was then introduced to 7.0. Let’s assume you are catching up with the releases and want to be at the latest release available, and then you upgraded from 4.4.x

Metrics 120

Metrics C++ Database Storage 120

SQL Performance

MARCH 11, 2020

In the previous articles ( Part 1 , Part 2 , and Part 3 ), I covered the meaning of the NULL as a marker for a missing value, how NULLs behave in comparisons and in other query elements, and standard NULL handling features that are not yet available in T-SQL. The standard unique constraint definition is a bit different than the T-SQL version.

C++ 135

C++ Code Servers Database 135

Smashing Magazine

JULY 20, 2022

But consider this post a compliment to the book, as this will focus purely on different tools available for reducing the size of images. The engine that powers this tool is also available as an API or CLI for bulk processing. You’ll definitely want to give SVGOMG a try! WebUtils Bulk Image Compress. It’s a GUI for SVGO, a Node.js-based

Media 142

Media Programming Mobile Website 142

CSS Wizardry

MAY 21, 2018

In order to do this, you’ll need to download the CSV file that Request Map makes available to you. F',' tells AWK to use a comma as our field separator (CSVs are, by definition, comma separated). $2 Cells in columns B and C can be yellow; cells in D , E , F , or G can be varying shades of red. Target Site" { print $1 }' cnn.csv.

Google 141

Google C++ Analytics Website 141

O'Reilly

FEBRUARY 25, 2025

For some context, over the past 15 years Ive been operating Python Tutor ( [link] ), a free online tool that tens of millions of people around the world have used to write, run, and visually debug their code (first in Python and now also in Java, C, C++, and JavaScript).

Code 82

Code Programming Servers Cloud 82

SQL Performance

MAY 11, 2022

Naturally, if a partitioning or ordering element doesn’t appear in the window function, you omit that part from the index definition. I ran all the examples on SQL Server ® 2019 Developer, where batch-mode on rowstore is available. The following query, which I’ll refer to as Query 5, illustrates this technique: WITH C AS. (

C++ 133

C++ Database Servers Code 133

Percona

AUGUST 30, 2023

In this blog, I am trying to list the options available for users and list them in increasing order of priority. For example, the high availability solution Patroni passes some of the most critical parameters as a command line argument. psql "host=localhost user=postgres options='-c synchronous_commit=off'" psql (14.8)

Database 120

Database Servers Open Source Tuning 120

The Morning Paper

MAY 16, 2019

Apart from root causes of these bugs, we also studied their fixes, performed experiments to reproduce them, and evaluated them with two publicly-available Go bug detectors. An especially interesting comparison can be made in the case of gRPC, which has both a C implementation and a Go implementation.

Programming 100

Programming C++ Design Code 100

SQL Performance

AUGUST 2, 2019

Some information is available in the SQL Server 2019 release notes , and there was a demo from Bob Ward and Conor Cunningham during the first day of the PASS Summit keynote. I restored a copy of WideWorldImporters and then created three stored procedures (definitions below). OrderID , c. Customers c ON o. CustomerID = c.

Servers 95

Servers C++ Testing Systems 95

Sutter's Mill

JANUARY 11, 2021

C++20 supports two main assertion facilities… For each one, briefly summarize how it works, when it is evaluated, and whether it is possible for the programmer to specify a message to be displayed if the assertion fails. For example, don’t use an assertion to check that a remote host is available, or that the user types valid input.

C++ 81

C++ Programming Code Testing 81

Testsigma

APRIL 8, 2020

Hands on with one of the programming languages (like JAVA (prefered), Python, Ruby, C#) that will be needed for automation of a test case in the backend. BDD is ineffective without a proper definition of business requirements since it does not cope well with poorly written user stories. Read more about step definitions here.

Development 96

Development Programming Testing Java 96

Smashing Magazine

AUGUST 9, 2021

ISPs and intermediate networks might block it because metrics such as average delays and packet loss percentages are no longer easily available, making it more difficult to detect and diagnose problems. This all means that QUIC will probably never be universally available, which we’ll discuss more in part 3 ( coming soon! ).

Transportation 145

Transportation Internet Internet Network 145

Alex Podelko

OCTOBER 28, 2016

While protocol-level recording/playback was (and still is) the mainstream approach to testing applications, it is definitely just one type of load testing using only one type of load generation; such equivalency is a serious conceptual mistake, dwarfing load testing and undermining performance engineering in general. LoadRunner) or Java (e.g.

Performance Testing 100

Performance Testing Technology Technology Testing 100

Sutter's Mill

JUNE 3, 2021

Briefly, what is the difference among: (a) undefined behavior Undefined behavior is what happens when your program tries to do something whose meaning is not defined at all in the C++ standard language or library (illegal code and/or data). By definition, if a function’s preconditions are violated, then the results are not specified.

C++ 73

C++ Programming Lambda Code 73

Percona

OCTOBER 10, 2023

Copyright (c) 2009-2023 Percona LLC and/or its affiliates Copyright (c) 2000, 2023, Oracle and/or its affiliates. Type 'c' to clear the current input statement. Type 'c' to clear the current input statement. Your MySQL connection id is 256 Server version: 8.0.32-24.2 Type 'help;' or 'h' for help. drop_triggers:10000:0.25,copy_rows:10000:0.25,swap_tables:10000:0.25,update_foreign_keys:10000:0.25,analyze_table:10000:0.25

Database 114

Database Performance C++ Engineering 114

Randon ASCII

OCTOBER 4, 2020

This means that the thread may end up waking up a bit late, but Windows is not a real-time OS and it actually cannot guarantee a specific wakeup time (there may not be a CPU core available at that time anyway) so waking up a bit late should be fine. That’s crazy! But that’s how Windows has always worked. Implications.

Programming 145

Programming Games Hardware Operating System 145

KeyCDN

JUNE 25, 2020

Vim was made available in 1991 and is a free, open source software. Available both as a command line interface and as a standalone program with a GUI, Vim is a text editor that is a modal version of the vi editor created for Unix in the 1970s; Vim stands for vi improved.

Open Source 125

Open Source Games Availability C++ 125

Highly Scalable

MARCH 10, 2015

This approach can be expressed in more formal way by the following equation: where is the data available for analysis, is the space of a retailer’s actions and decisions, is an econometric model defined as a function of actions and data, and is the optimal strategy. This framework resembles the approach suggested in [JK98].

Retail 152

Retail C++ Analytics Metrics 152

Scalegrid

FEBRUARY 15, 2024

MongoDB® SSL with Self-Signed Certificates in C# Configuring MongoDB Server for SSL/TLS Encryption Once your certificates are ready, the next step is configuring the MongoDB server for SSL/TLS encryption, allowing you to securely connect to MongoDB. While we’re yet to run comprehensive tests, there is definite overhead due to using SSL.

Servers 130

Servers Best Practices Government Network 130

Percona

SEPTEMBER 27, 2023

PostgreSQL Partition Manager — ‘pg_partman’ — is an open source extension freely available, widely supported, and actively maintained by the PostgreSQL community. pg_partman creates and manages both time-based and serial-based table partition sets.

Storage 114

Storage Open Source Database Efficiency 114

SQL Performance

APRIL 10, 2019

You can find coverage of RPR, including illustrated examples, in a 90-page technical report ISO/IEC TR 19075-5 (available for free). You can also find it as part of the document ISO/IEC 9075-2:2016, Information technology — Database languages — SQL — Part 2: Foundation (SQL/Foundation) (available for purchase).

C++ 73

C++ Servers Virtualization Code 73

Sutter's Mill

FEBRUARY 25, 2021

Explain your answer using the following example, which uses a variation of a proposed post-C++20 syntax for preconditions. [1] Rewrite the example in Question 1 to show how to approximate the same effect using assertions in today’s C++. This has the big benefit that it works using today’s C++.

C++ 69

C++ Code Testing Systems 69