Scalegrid

JULY 29, 2020

In our final post, we will put them head-to-head in a detailed feature comparison and compare the results of PgBouncer vs. Pgpool-II performance for your PostgreSQL hosting ! However, these must be set up outside the PostgreSQL system, while PgBouncer can offload this to the PostgreSQL server. PostgreSQL Connection Pooling Series.

Benchmarking 246

Benchmarking Database Performance Testing Availability 246

Percona

JUNE 4, 2023

In this blog, we’ll provide a comparison between MariaDB vs. MySQL (including Percona Server for MySQL ). Introduction: MariaDB vs. MySQL The goal of this blog post is to evaluate, at a higher level, MariaDB vs. MySQL vs. Percona Server for MySQL side-by-side to better inform the decision making process.

Open Source 52

Open Source Servers Storage Scalability 52

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. Description.

IoT 61

IoT Servers Development Cache 61

Brendan Gregg

NOVEMBER 4, 2020

PID COMM FD ERR PATH 27974 opensnoop 28 0 /etc/localtime 1482 redis-server 7 0 /proc/1482/stat 1657 atlas-system-ag 3 0 /proc/stat […]. Mbytes to the kernel image (this is tiny in comparison to DWARF debuginfo, which can be hundreds of Mbytes). However, **Appendix C's Python programming examples are now considered deprecated.**

C++ 145

C++ Programming Storage Code 145

SQL Performance

NOVEMBER 11, 2020

WITH C AS ( SELECT SYSDATETIME ( ) AS dt ) SELECT @i += 1 FROM C WHERE dt = dt ; PRINT @i ; GO. -- Batch 3. WITH C AS ( SELECT SYSDATETIME ( ) AS dt ) SELECT @i += 1 WHERE ( SELECT dt FROM C ) = ( SELECT dt FROM C ) ; PRINT @i ; GO. ) SELECT C1. orderid , C1.

C++ 122

C++ Code Storage Processing 122

SQL Performance

APRIL 13, 2022

L0 AS ( SELECT 1 AS c. My test machine has four logical CPUs, running SQL Server ® 2019 Enterprise. I’ll assume you’re using an environment designed to support batch mode on row store either directly, e.g., using SQL Server 2019 Enterprise edition like mine, or indirectly, by creating a dummy columnstore index on the table.

C++ 136

C++ Strategy Testing Servers 136

HammerDB

JUNE 27, 2022

HammerDB supports the most popular databases on the db-engines ranking , namely Oracle Database, Microsoft SQL Server, IBM Db2, TimesTen, MySQL, MariaDB, PostgreSQL, Greenplum, Postgres Plus Advanced Server, Citus Data, Amazon Aurora and Amazon Redshift. Supported Databases. Derived Workloads. The NOPM Metric.

Benchmarking 62

Benchmarking Open Source C++ Cache 62

SQL Performance

FEBRUARY 12, 2020

In Part 1 I covered the meaning of the NULL marker and how it behaves in comparisons. In Part 1 in the series I explained how NULLs behave in comparisons and the complexities around the three-valued predicate logic that SQL and T-SQL employ. Often in practice you want NULLs to behave just like non-NULL values for comparison purposes.

C++ 120

C++ Code Servers Database 120

SQL Performance

JULY 1, 2021

There was the case where a colleague constantly promoted the deprecated backward compatibility view sys.sysprocesses instead of newer dynamic management views (DMVs), and another case where a different colleague took down a production server using SQL Server Profiler. name , [ Column ] = c. system_type_id <> c.

C++ 58

C++ Database Servers Performance 58

HammerDB

DECEMBER 9, 2020

is the refactoring of the stored procedures for some of the TPROC-C workloads. The TPROC-C workload is derived from the TPC-C workload , the primary metric for TPC-C is called tpmC, the number of new order transactions processed per minute. For SQL Server note that a change in the TPM metric was introduced at v3.3

C++ 52

C++ Benchmarking Metrics Database 52

SQL Performance

MARCH 9, 2022

But SQL Server doesn’t currently support an efficient combination of parallel order-preserving index operation prior to a parallel batch-mode Window Aggregate operator, so as a result, an explicit parallel Sort operator precedes each of the parallel Window Aggregate operators. . - Performance Comparison. 2 1000 3.000000.

C++ 138

C++ Code Efficiency Performance 138

SQL Performance

DECEMBER 9, 2020

L0 AS ( SELECT 1 AS c. Figure 1: Plan for base CTE cardinality of 2.

C++ 114

C++ Servers Testing Processing 114

SQL Performance

DECEMBER 11, 2019

I start with coverage of what NULLs are and how they behave in comparisons. Comparisons involving NULLs. I'll first cover comparisons involving constants. Later I'll cover comparisons involving variables, parameters and columns. This way you can avoid unnecessary bugs and pitfalls.

Best Practices 117

Best Practices C++ Database Code 117

SQL Performance

APRIL 14, 2021

b FROM L1 AS A CROSS JOIN L1 AS B CROSS JOIN L1 AS C ) INSERT INTO dbo. Scan count 2, logical reads 0, physical reads 0, page server reads 0, read-ahead reads 0, page server read-ahead reads 0, lob logical reads 8, lob physical reads 0, lob page server reads 0, lob read-ahead reads 0, lob page server read-ahead reads 0.

C++ 112

C++ Servers Testing Code 112

HammerDB

OCTOBER 23, 2023

HammerDB has always used stored procedures as a design decision because the original benchmark was implemented as close as possible to the example workload in the TPC-C specification that uses stored procedures. Additionally, reviewing official TPC-C full disclosure reports highlighted that all vendors also use stored procedures.

Benchmarking 62

Benchmarking Database Network C++ 62

HammerDB

JULY 16, 2021

with the TPROC-C workload on a system with 2 sockets of Intel Xeon 8280L that means we have 28 cores per socket, with 56 physical CPUs and 112 logical CPUs with Hyper-Threading. software running on the same server. This is the same server, same OS and same HammerDB client, the only difference is in the server software.

Virtualization 57

Virtualization Performance C++ Database 57

SQL Performance

MAY 8, 2019

GetNums ( 1 , 100 ) AS C WHERE C. Since the reference to custid in the inner query is unqualified, SQL Server has to resolve which table the column is coming from. CREATE TABLE dbo. Customers. ( ( custid INT NOT NULL. CONSTRAINT PK_Customers PRIMARY KEY , companyname VARCHAR ( 50 ) NOT NULL. )

Best Practices 68

Best Practices C++ Code Servers 68

The Netflix TechBlog

APRIL 17, 2019

SVT-AV1 uses parallelization at several stages of the encoding process, which allows it to adapt to the number of available cores including newest servers with significant core count. However, rav1e is written in Rust programming language, whereas an encoder written in C has a much broader base of potential developers.

Open Source 166

Open Source Scalability Speed Efficiency 166

SQL Performance

MAY 12, 2021

Scan count 2, logical reads 0, physical reads 0, page server reads 0, read-ahead reads 0, page server read-ahead reads 0, lob logical reads 44 , lob physical reads 0, lob page server reads 0, lob read-ahead reads 0, lob page server read-ahead reads 0. Table 'CS'. Table 'CS'. Segment reads 2, segment skipped 0. Table 'CS'.

C++ 111

C++ Servers Database Code 111

SQL Performance

DECEMBER 9, 2020

L0 AS ( SELECT 1 AS c. Figure 1: Plan for base CTE cardinality of 2.

C++ 61

C++ Servers Testing Processing 61

SQL Server According to Bob

JANUARY 11, 2020

Microsoft, ​​ Windows, ​​ Windows NT, ​​ and Windows Server ​​ are registered trademarks of Microsoft Corporation in the United States and/or other countries. The names of actual companies and products mentioned herein may be the trademarks of their respective owners.

Servers 40

Servers Cache Database Media 40

SQL Performance

SEPTEMBER 5, 2019

I briefly mentioned that batch mode data is normalized in my last article Batch Mode Bitmaps in SQL Server. You will need SQL Server 2016 (or later) and Developer Edition (or equivalent) to reproduce the results shown here. c = COUNT_BIG ( * ) FROM #T AS T WHERE 1 = ( SELECT 1 ) -- Avoid trivial plan.

Performance 81

Performance C++ Storage Servers 81

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. This article is Part 4 in a series about NULL complexities.

C++ 135

C++ Code Servers Database 135

Brendan Gregg

SEPTEMBER 25, 2021

This server is spending about a third of its CPU cycles just checking the time! As (C) looked like a kernel rebuild, I started with (D) and (E). ## 5. As I'm interested in the relative comparison I can just compare the total runtimes (the "real" time) for the same result. 30.14% in the middle of the flame graph. us on Ubuntu.

Speed 126

Speed Java AWS Virtualization 126

Highly Scalable

SEPTEMBER 18, 2012

In comparison with pure anti-entropy, this greatly improves consistency with a relatively small performance penalty. C) In the previous schema, failures can be handled better using the hinted handoff technique [8]. Consider an example: there are 3 nodes A, B, and C and increment operation was applied 3 times, once per node.

Database 213

Database Latency C++ Scalability 213

Brendan Gregg

OCTOBER 8, 2018

C @ns: [256, 512) 10900 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ | [512, 1k) 18291 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@| [1k, 2k) 4998 |@@@@@@@@@@@@@@ | [2k, 4k) 57 | | [4k, 8k) 117 | | [8k, 16k) 48 | | [16k, 32k) 109 | | [32k, 64k) 3 | |. Here's a comparison for an average-sized DTraceToolkit script (seeksize.d)

C++ 110

C++ Virtualization Programming Latency 110

Brendan Gregg

NOVEMBER 3, 2020

Mbytes to the kernel image (this is tiny in comparison to DWARF debuginfo, which can be hundreds of Mbytes). The BCC tools should eventually be switched from Python to libbpf C under the hood, but will work the same. However, **Appendix C's Python programming examples are now considered deprecated.** It adds about 1.5

C++ 40

C++ Programming Storage Code 40

Brendan Gregg

NOVEMBER 3, 2020

PID COMM FD ERR PATH 27974 opensnoop 28 0 /etc/localtime 1482 redis-server 7 0 /proc/1482/stat 1657 atlas-system-ag 3 0 /proc/stat […]. Mbytes to the kernel image (this is tiny in comparison to DWARF debuginfo, which can be hundreds of Mbytes). However, **Appendix C's Python programming examples are now considered deprecated.**

C++ 40

C++ Programming Storage Code 40

Enprowess

MAY 24, 2022

Reactjs has the capability of server-side rendering, which offers a power boost to the SEO of a web page or an application and helps in fetching more organic traffic. When a web crawler visits a server that has already rendered the content and pictures, indexing and caching of the content becomes quicker. Abstraction layer issue.

Mobile 52

Mobile Open Source Virtualization Speed 52

Smashing Magazine

NOVEMBER 26, 2021

Most front-end applications will fetch data from a back-end server and render it on the page. You can take a look at their comparison and features to decide which one you should use. There is an excellent article The Testing Trophy and Testing Classifications by Kent C. I haven’t used XState but it is also a popular choice.

Cache 143

Cache Code Testing Design 143

Testsigma

JULY 31, 2021

It can be easily integrated with a range of DevOps tools, and it supports tech stacks such as.NET, C#, HTML5, Java, etc. You can run tests simultaneously on physical servers, virtual servers, or Selenium grids. You can run tests simultaneously on physical servers, virtual servers, or Selenium grids. Highlights.

Testing 52

Testing Testing Tools Analytics Java 52

Percona

JANUARY 17, 2019

I will compare AWS Aurora with MySQL (Percona Server) 5.6 For my test, I need to choose: Aurora instance type and comparison. Aurora instance type and comparison. 84.1 | | version_comment | Percona Server (GPL), Release 84.1, AWS Aurora (based on MySQL 5.6) Test data and versions.

Cache 47

Cache C++ AWS Airlines 47

SQL Performance

JANUARY 8, 2020

I also explained how comparisons involving NULLs work with constants, variables, parameters and columns. A much more elegant option is to use the CONCAT_WS function, which was introduced in SQL Server 2017. 3 C NULL 4 D 150.00 This function concatenates the inputs, ignoring NULLs, using the separator provided as the first input.

Design 65

Design C++ Code Database 65

Percona

MAY 2, 2023

During the logical backups, using client API, the data gets read from the server and returned back to the same API, which will be serialized and written into respective “ bson”, “ json” or “ csv” backup files on disk depending upon the type of backup utilities used.

Best Practices 52

Best Practices Database Storage Servers 52

Testsigma

APRIL 16, 2021

Appium gives us the freedom to write scripts in any language of our choice, like Java, Ruby, C#, Javascript, PHP, Python. Easy set-up process, but it’s important to note that setting up Appium is easy for programmers only because it requires solid programming skills for configuring the server.

Testing 52

Testing Open Source Mobile Java 52

Smashing Magazine

JANUARY 11, 2021

Alternatively, you can also use: Addy Osmani’s Chrome UX Report Compare Tool , Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). It used to provide an insight into how quickly the server outputs any data. What does it mean?

Performance 145

Performance Cache Media Metrics 145

Testsigma

JUNE 26, 2021

Ranorex Studio : Ranorex Studio is a codeless test automation tool that supports tech stacks such as.NET, C#, HTML5, Java, etc. Parallel test execution: You can run tests parallelly on physical servers, virtual servers, or Selenium grids. This tool supports testing mobile, web, cross-browser, hybrid apps, etc.,

Testing Tools 52

Testing Tools Testing Analytics Mobile 52