SQL Performance

MAY 13, 2020

I just wanted to mention some use cases here to illustrate how important table expressions are in our T-SQL code, and why it's worthwhile to invest in understanding their fundamentals well. A persistent base table is either a regular persistent base table or a system-versioned table. C is what's known as a range variable.

C++ 143

C++ Code Design Servers 143

SQL Performance

JULY 13, 2022

This could also happen if you need to migrate code written for another database platform with a different dialect of SQL to T-SQL. Use the following code to create the Orders table and populate it with a small set of sample data to help you verify the validity of the solutions: SET NOCOUNT ON ; USE tempdb ; DROP TABLE IF EXISTS dbo.

C++ 112

C++ Code Azure Database 112

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

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 226

Artificial Intelligence Monitoring Infrastructure Cloud 226

Percona

OCTOBER 17, 2023

Many changes and new features are brought to the system, and as part of keeping in tune with the changes and how they can impact us, we go through the changes to better understand them. The dynamic allocation might have flaws, but it’s definitely a good addition. From that, this article is born.

Metrics 102

Metrics C++ Storage Database 102

Testsigma

APRIL 8, 2020

Then the code can be refactored to improve its quality. The test cases are defined to replicate the behaviour of the system thus the name ‘Behavior Driven Development’. 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.

Development 96

Development Programming Testing Java 96

Percona

AUGUST 30, 2023

If a PostgreSQL user wants to change these values, they need to recompile the PostgreSQL from the source code. cat /usr/lib/systemd/system/postgresql-14.service. That is where all “ALTER SYSTEM SET/RESET” commands keep the information. But another database might be an OLAP system. Type "help" for help.

Database 103

Database Servers Open Source Tuning 103

Sutter's Mill

JANUARY 11, 2021

Assertions have been a foundational tool for writing understandable computer code since we could write computer code… far older than C’s assert() macro, they go back to at least John von Neumann and Herman Goldstine (1947) and Alan Turing (1949). 1,2] How well do we understand them… exactly? GUIDELINE: Assert liberally. [3]

C++ 58

C++ Programming Code Testing 58

Adrian Cockcroft

FEBRUARY 9, 2023

The third is that the Team Topologies book defined how to create and manage Platform Teams so there’s interest in the terminology and definition. The next layer is operating system platforms, what flavor of Linux, what version of Windows etc. The second is that some companies with tools to sell are marketing the term.

Engineering 137

Engineering Serverless Lambda AWS 137

Percona

JUNE 7, 2023

Triggers on Data Definition Language (DDL) events are a powerful feature of PostgreSQL that allows you to perform additional actions in response to changes to the database schema. Let’s see an example that throws an error if the table name does not start with ‘tbl_’ Similar code can be developed for any object.

Database 76

Database Best Practices Open Source C++ 76

SQL Performance

MARCH 11, 2020

To demonstrate the T-SQL implementation of a unique constraint, run the following code, which creates a table called T3 with a unique constraint defined on the NULLable INT column col1, and populates it with a few sample rows: USE tempdb ; GO. The standard unique constraint definition is a bit different than the T-SQL version.

C++ 135

C++ Code Servers Database 135

SQL Performance

OCTOBER 1, 2020

In my last post , I showed how to use TSqlParser and TSqlFragmentVisitor to extract important information from a T-SQL script containing stored procedure definitions. And with the Visitor code I provided, the output to the console was: ==. Param name: @c. AS PRINT 1 ; GO. ProcedureReference. ==. dbo.procedure1. ==. Default: -64.

C++ 57

C++ Code Database Systems 57

SQL Performance

MAY 12, 2021

Use the following code to create the database if it doesn’t exist, and to enable I/O and time statistics: -- DB and stats. For simplicity’s sake, I’ll disable CLR strict security and make the database trustworthy using the following code: -- Enable CLR, disable CLR strict security and make db trustworthy. USE testdb ; GO. BatchMe ; GO.

C++ 111

C++ Servers Database Code 111

SQL Performance

AUGUST 2, 2019

There are a few additional coding recommendations that Pam Lahoud discusses in her very informative post, TEMPDB – Files and Trace Flags and Updates, Oh My! The latest adaptation by the SQL Server team is moving the system tables (metadata) for tempdb to In-Memory OLTP (aka memory-optimized). OrderID , c. Customers c ON o.

Servers 95

Servers C++ Testing Systems 95

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] GUIDELINE: Use a precondition to write “this is what a bug is” as code the caller can check. A precondition states in code the circumstances under which this function’s behavior is not documented.

C++ 49

C++ Code Testing Systems 49

HammerDB

FEBRUARY 25, 2021

On high-performance multi-core systems all the supported databases can return performance in the many millions of transactions per minute. For HammerDB both TPROC-C and TPROC-H run all of their workloads on the database being tested in SQL. The following is an example from TPROC-C from SQL Server. Database interfaces in C.

Programming 67

Programming Benchmarking Virtualization C++ 67

Testsigma

FEBRUARY 3, 2021

Mobiles have different models, screen resolutions, operating systems, network types, hardware configurations, etc. Unit Testing – Developers execute unit tests for the smallest unit of code, whenever they commit new code in the code repository. Operating Systems- Windows, iOS, Android, etc. signup for free.

Mobile 82

Mobile Testing Hardware C++ 82

SQL Performance

JUNE 10, 2020

Unlike the conceptual treatment of the data which is based on a mathematical model and a standard language, and hence is very similar in the various relational database management systems out there, the physical treatment of the data is not based on any standard, and hence tends to be very platform-specific.

C++ 109

C++ Database Servers Code 109

Randon ASCII

MARCH 30, 2020

I did my tests on an October 2019 version of Chromium’s code because that gave me the most flexibility about which build options to use. The graph below shows the relationship between the number of lines of code in source files and how long it took to compile them. million lines of source code in the primary source files.

C++ 87

C++ Code Open Source Programming 87

ScaleOut Software

JULY 14, 2021

Azure Digital Twins for creating a graphical representation of the assets within an organization using the Digital Twin Definition Language, processing events, and visualizing entity graphs to display and query status. This makes developing streaming analytics code for real-time digital twins fast and easy.

IoT 52

IoT Azure Analytics Serverless 52

Sutter's Mill

MARCH 25, 2021

But if the sight of these function signatures has had you pulling your hair and shouting “use the type system, Luke!” Hiding data members is good dependency management because it limits the code that can depend on the details of the data and is responsible for maintaining the correct relationship among the data members.

C++ 45

C++ Design Code Systems 45

Randon ASCII

OCTOBER 4, 2020

First, a bit of operating-system design context. Ideally the CPU goes to sleep when Sleep(1) is called, in order to save power, so how does the operating system (OS) wake your thread if the CPU is sleeping? If multiple threads can synchronize or coalesce their timer waits then the system becomes more power efficient.

Programming 145

Programming Games Hardware Operating System 145

Sutter's Mill

FEBRUARY 8, 2021

2] Explain your answer using the following example, which uses a variation of a proposed post-C++20 syntax for postconditions. [1] 2] Explain your answer using the following example, which uses a variation of a proposed post-C++20 syntax for postconditions. [1] How can we approximate those advantages? goto post; or _return_ =.;

C++ 45

C++ Lambda Efficiency Code 45

All Things Distributed

DECEMBER 1, 2016

Amazon EC2 Systems Manager : A collection of tools for package installation, patching, resource configuration, and task automation on Amazon EC2. We also added C# support for AWS Lambda. We're excited to see how customers you will put these new features to work. *: Sean Connery is the definitive Bond.

AWS 162

AWS Development Lambda Open Source 162

SQL Performance

JUNE 10, 2020

Unlike the conceptual treatment of the data which is based on a mathematical model and a standard language, and hence is very similar in the various relational database management systems out there, the physical treatment of the data is not based on any standard, and hence tends to be very platform-specific.

C++ 93

C++ Database Servers Code 93

Nick Desaulniers

APRIL 6, 2020

That doesn’t happen in kernel code; the CPU does that on its own. This is also documented in a comment at the start of early_idt_handler_common (“hardware frame” and “error code” together are the exception frame): /* * The stack is the hardware frame, an error code or zero, and the * vector number. */.

C++ 67

C++ Hardware Code Virtualization 67

Smashing Magazine

AUGUST 9, 2019

One way this can be achieved is through the use of methodologies such as Object-Oriented CSS (OOCSS), which rather than organizing CSS around page context, encourages separating structure (grid systems, spacing, widths, etc.) As is the case with all 3rd party dependencies, this means relying on somebody else's code. list-group.card.

Performance 94

Performance C++ Media Website 94

Sutter's Mill

JANUARY 25, 2021

We want a way to enable checking for some assertions but not others in the same code, because we may not always be able to afford expensive checks. If you develop your own assertion system for in-house use, support enabling/disabling at least these kinds of assertions independently. [1] in production).

C++ 45

C++ Programming Cache Testing 45

Percona

MARCH 7, 2019

It’s important to understand where the CPU time is being consumed: user space, system space, iowait, and so on. In other words, the time the CPU was executing user code, such as MySQL. There could be more, but this particular query was definitely hurting the performance of the server. d) Tackle the problems bit by bit.

C++ 101

C++ Traffic Servers Monitoring 101

SQL Performance

APRIL 8, 2020

It occurred to me that both the naming confusion, and the confusion around whether there's a persistency aspect to table expressions, can be cleared with a better understanding of the fundamentals of our field of relational database management systems. When I read C. My expertise is T-SQL. Date (O'Reilly 2015).

C++ 143

C++ Azure Database Servers 143

Randon ASCII

JANUARY 22, 2017

In this episode I’ll show how deleting an inline function definition can lead to similar savings. The savings this time are less important as they are mostly in the.BSS segment, but there are also some modest code-size savings, and some interesting lessons. In August of 2016 Chrome switched meta-build systems, from gyp to gn.

C++ 56

C++ Code Systems Processing 56

Nick Desaulniers

OCTOBER 24, 2018

qemu-system-x86_64. s -S & $ gdb vmlinux ( gdb ) target remote :1234 ( gdb ) hbreak start_kernel ( gdb ) c ( gdb ) lx-dmesg. qemu-system-x86_64 -kernel arch/x86_64/boot/bzImage. qemu-system-x86_64 -kernel arch/x86_64/boot/bzImage -nographic. It will seem that there’s no output, and QEMU isn’t responding to ctrl+c.

C++ 56

C++ Hardware Virtualization Systems 56

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

ScaleOut Software

SEPTEMBER 20, 2018

When using the digital twin model, each data source in a physical system has a corresponding software object in the stream-processing platform as depicted here: This object encapsulates both state information and code. Using this object-oriented approach maximizes code reuse and saves development time.

Programming 63

Programming IoT Java Analytics 63

Testsigma

DECEMBER 27, 2019

If your application is compatible enough, it will definitely help in obtaining a good business. Today, considering the wide range of browsers, devices and operating systems available, cross browser testing plays a crucial role in the software development industry. But which is better? Image source. Need for Cross Browser Testing.

Testing 54

Testing Testing Tools Operating System Mobile 54

The Agile Manager

AUGUST 31, 2021

If we accept the fact that Agile is a value system and not a set of mechanical processes, it stands to reason that there must be something different about the norms and behaviors of Agile managers vis-a-vis traditional managers. The best Agile managers are outstanding at scope definition and scope control.

Metrics 52

Metrics Design Engineering C++ 52

The Morning Paper

NOVEMBER 7, 2019

Whereas most root cause analysis systems start from the failure and work backwards, Kairux starts from the beginning of the program execution and works forwards. Here’s the original code: The bug stems from using Long.MAX_VALUE as a special block size value to indicate that a block is being deleted.

Programming 47

Programming Java C++ Testing 47