Percona

MARCH 27, 2023

On MySQL and Percona Server for MySQL , there is a schema called information_schema (I_S) which provides information about database tables, views, indexes, and more. You can read some optimization examples in the official doc: [link]. Results for Percona Server for MySQL 8.0 While you are on 5.7, Try Percona Distribution for MySQL today!

Cache 104

Cache Hardware Servers Benchmarking 104

Percona

FEBRUARY 16, 2023

keyring_file_data=/var/lib/mysql/keyring_file mysql> create database test; mysql> show create schema testG 1. row Database: test Create Database: CREATE DATABASE `test` /*!40100 00000030: 0000 0000 0000 0000 2000 0000 0000 0000. 00000030: 0000 0000 0000 0000 2000 0000 0000 0000.

Database 119

Database Servers Engineering Testing 119

Percona

OCTOBER 2, 2023

You can get summaries of your database servers, or you verify replication lag on MySQL and PostgreSQL servers. You get thirty-eight scripts that can do any manner of actions, and you will find them very valuable in your regular database work. And did I mention they are open source?! 25 Buffer Pool Size | 128.0M

Cache 101

Cache Database Virtualization Servers 101

HammerDB

JULY 14, 2021

However, as the two databases diverged from a shared common codebase, this presented a challenge in that it was not possible to modify the workload for MySQL or MariaDB without also changing the other. Checking database library for MariaDB Error: failed to load mariatcl - couldn't load file "/home/HammerDB-4.2/lib/mariatcl0.1/libmariatcl0.1.so":

Testing 57

Testing C++ Virtualization Tuning 57

All Things Distributed

APRIL 5, 2013

At the end of the 80s Ceri and Widom were researching the fundamentals of integrity constraints in databases. In 2000 they were invited by the VLDB conference to review 10 years of work around Constraints and Triggers with an eye on the practical application of both abstractions. By Werner Vogels on 05 April 2013 08:30 AM. Comments ().

Scalability 73

Scalability Database Systems 73

HammerDB

JUNE 22, 2023

Configuring the Jobs Database The base configuration is set in the xml files in the config directory with the jobs SQLite database being set in the commandline section of generic.xml by specifying the filename. Copyright (C) 2003-2023 Steve Shaw Type "help" for a list of commands Initialized new Jobs on-disk database /opt/HammerDB-4.8/DATA/hammer.db

Benchmarking 57

Benchmarking C++ Virtualization Database 57

Percona

DECEMBER 5, 2022

The need to audit who is using a database and their activities is crucial in many environments. 22 Percona Server (GPL), Release '22', Revision '7e301439b65' Copyright (c) 2009-2022 Percona LLC and/or its affiliates Copyright (c) 2000, 2022, Oracle and/or its affiliates. Percona Server for MySQL is a drop-in replacement for MySQL.

Open Source 69

Open Source C++ Servers Database 69

Percona

JUNE 15, 2023

The reason might be application requirements, compatibility issues, or MySQL bug fixes, or we want the same MySQL version to be installed on all database instances in the cluster, regardless of what actually is the latest version available. bullseye [112 MB] …… (Reading database. deb (Reading database.

Servers 85

Servers C++ Database Systems 85

Percona

DECEMBER 5, 2022

Proxysql has a stats database which we can see with an admin login. This database contains metrics gathered by ProxySQL concerning its internal functioning. Your MySQL connection id is 1 Server version: 5.5.30 (ProxySQL Admin Module) Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others. Explanation.

Servers 60

Servers Cache C++ Metrics 60

Percona

JANUARY 5, 2023

In this blog, I will share a solution to remove this space and remove rows from tables in a few seconds regardless of the size of a table without causing any additional load on the database using table partitions. The first approach that comes to anyone’s mind for deleting the row is using a DELETE query in SQL. ibd -rw-r --. frm -rw-r --.

Traffic 60

Traffic Engineering Speed Storage 60

Particular Software

APRIL 3, 2023

Usually, messages only arrive at a rate of about 20 messages per second, but the system needs to be reliable and scalable enough to handle between 1000 to 2000 messages per second. If you miss it the first time, you have a problem.

Airlines 52

Airlines Systems Processing Design 52

SQL Server According to Bob

JUNE 3, 2016

The following chart shows the same 1TB database testing. iID int NOT NULL IDENTITY(1,1) PRIMARY KEY CLUSTERED, strData nvarchar(2000) NOT NULL. ). insert into tblDBCC (strData) values ( replicate(N’X’, 2000) ). insert into tblDBCC (strData) values ( replicate(N’X’, 2000) ). set nocount on.

Hardware 40

Hardware Cache Servers Software Engineering 40

All Things Distributed

JANUARY 25, 2013

My paper to read this weekend was the Alan Demers seminal paper on epidemic techniques for database replication. Epidemic algorithms for replicated database maintenance. Epidemic algorithms in replicated databases. of Database. Foundations of Computer Science, 2000. Back-to-Basics Weekend Reading - Epidemics.

Database 89

Database Scalability C++ Systems 89

Adrian Cockcroft

MARCH 21, 2020

You need an “abtest” database service. In a small system this may be a table in a central relational database, but it’s best setup as a NoSQL data source using something like Amazon DynamoDB or Apache Cassandra, with a caching client library or at large scale a microservice data access layer.

Testing 52

Testing Tuning Database Cache 52

HammerDB

OCTOBER 17, 2018

However most people use HammerDB with keying and thinking time disabled and therefore each virtual user can approximately drive the CPU resources of one CPU core on the database server. Note that if using CPUs with Hyper-Threading allow for additional CPU capacity, so size as if there were 35% more physical cores.

C++ 40

C++ Testing Virtualization Cache 40

SQL Performance

FEBRUARY 22, 2021

The official documentation for sys.sysprocesses warns: This SQL Server 2000 system table is included as a view for backward compatibility. But dbid is unreliable and marginally useful anyway, particularly for cross-database queries; there's much better info in sys.dm_tran_locks. Sure, sys.sysprocesses has dbid and waittime.

Latency 57

Latency Servers Monitoring Systems 57

CSS - Tricks

OCTOBER 16, 2019

I'd prefer that the images within content are stored as totally functional HTML in my database: <img src="/images/flower.jpg" alt="a blue flower"> It could be fancier than that, like using srcset (but probably not sizes as that will change as the design changes), or be contained within <picture> or <figure> elements.

Media 44

Media Servers Database Design 44

Percona

MARCH 29, 2023

mysql> SELECT * FROM salaries where emp_no=10001 and from_date='1999-06-23'; + --+ --+ + + | emp_no | salary | from_date | to_date | + --+ --+ + + | 10001 | 84917 | 1999-06-23 | 2000-06-22 | + --+ --+ + + 1 row in set (0.00 sec) But once the data is misplaced, it does not return any rows. Try Percona Distribution for MySQL today!

Engineering 103

Engineering Open Source Database Scalability 103

Percona

MARCH 8, 2023

Over the years of being a DBA, I had to deal with all kinds of problems in the database. Still, the users keep falling into this trap, maybe because of a poorly configured database, a change in the application components, or just because of a sudden increase of connections in the application. A lot has been written about this error.

C++ 96

C++ Database Servers Open Source 96

SQL Performance

AUGUST 2, 2019

I have been making the same recommendations about tempdb since I started working with SQL Server over 15 years ago, when I was working with customers running version 2000. ALTER DATABASE [ WideWorldImporters ] SET QUERY_STORE = ON ; GO. I would recommend for production) */. USE [ master ] ; GO.

Servers 95

Servers C++ Testing Systems 95

The Netflix TechBlog

JULY 26, 2021

In the initial stage, data consumers set up ETL pipelines directly pulling data from databases. With this batch style approach, several issues have surfaced like data movement is tightly coupled with database tables, database schema is not an exact mapping of business data model, and data being stale given it is not real time etc.

Big Data 253

Big Data Government Analytics Processing 253

Percona

AUGUST 29, 2023

A single command to deploy the operator would be: kubectl apply -f [link] --server-side Init SQL script Init SQL allows the creation of the database cluster with some initial data in it. You can find all examples from this blog post in this GitHub repository. Everything is created with postgres admin user. Search for init SQL.

Storage 97

Storage Database Media Open Source 97

SQL Server According to Bob

JANUARY 11, 2020

KB sectors run on smaller sectors   14 System and sample databases   15 Determining the formatted sector size of database   15 What sector sizes does SQL Server support? and ​​ 2000. KB boundary   12 Larger transaction logs   13 Restore and attach   14 Format for 4 ?KB

Servers 40

Servers Cache Database Media 40

Percona

MAY 15, 2023

The main reason behind this is that MySQL is a relational database system (RDBMS), and any data that is going to be written in it must respect the RDBMS rules. In shard-nothing, each shard can live in a totally separate logical schema instance / physical database server/data center/continent. The POC Why this POC?

Traffic 125

Traffic Scalability Database Servers 125

The Netflix TechBlog

FEBRUARY 13, 2020

The JPEG 2000 format , based on the discrete wavelet transform (DWT), was introduced as a successor to JPEG in the year 2000. Webp does not have all the flexibilities of JPEG 2000. Webp is based on intra-frame coding from the VP8 video coding format. High-Efficiency Video Coding ( HEVC ) is the successor of H.264, 264, a.k.a.

Code 212

Code Metrics Efficiency Open Source 212

SQL Server According to Bob

JANUARY 11, 2020

Microsoft SQL Server I/O Basics Author: ​​ Bob Dorr, Microsoft SQL Server Escalation Published: ​​ December, 2004 SUMMARY: ​​ Learn the I/O requirements for Microsoft SQL Server database file operations. This will help you increase system performance and avoid I/O environment errors.

Servers 40

Servers Cache Media Hardware 40

HammerDB

DECEMBER 14, 2022

The TPC publishes an official Docker image on Docker Hub to enable the rapid deployment and testing of databases with HammerDB. This image includes example scripts to build schemas and test your databases with a single command. hammerdb>librarycheck Checking database library for Oracle Success. Database Configuration.

C++ 62

C++ Virtualization Database Benchmarking 62

The Morning Paper

NOVEMBER 22, 2020

Is there anything more terrifying, and at the same time more useful, to a database vendor than Kyle Kingsbury’s Jepsen ? As the abstract to today’s paper choice wryly puts it, “ experience shows that many databases do not provide the isolation guarantees they claim.” Giving the database the benefit of the doubt. Adya et al.

Database 58

Database Processing Testing Website 58

Testsigma

FEBRUARY 6, 2020

How well the application will perform under stressful conditions of Database, Users, Data Load etc. Volume Testing- Aim of this testing is to ascertain how well the system behaves when a large volume of data or data operations are handled by Database. Will the database be able to store and process a huge volume of data?

Software 69

Software Software Testing Scalability 69

Dynatrace

APRIL 21, 2022

Too much data requested from a database. Figure 5 – Dynatrace measures over 2000 different metrics ready for use as dedicated SLIs. To understand, reduce, and optimize back-end systems, the service flow diagrams can show common performance problems: Too many roundtrips between services. Missing caching layers.

Azure 196

Azure Monitoring Virtualization Metrics 196

SQL Performance

OCTOBER 7, 2020

If you’re interested in table-valued function rewinds, please see my Q & A on Database Administrators Stack Exchange. The Sort operator’s rewind behaviour may seem strange, but it has been this way from (at least) SQL Server 2000 to SQL Server 2019 inclusive (as well as Azure SQL Database). Sort Rewinds.

Servers 106

Servers Cache Azure Performance 106

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. Durability: “In database systems , durability is the ACID property which guarantees transactions that have committed will survive permanently.

Servers 90

Servers Media Cache Storage 90

The Morning Paper

JULY 18, 2019

For example, a Google Bigtable database usually contains one Bloom Filter per SSTable file. In the case of a large database we think this is warranted, a database with 100K separate set membership data structures will bene?t

Network 86

Network Java Database Hardware 86

Testsigma

FEBRUARY 27, 2021

It has features such as easy-to-create test cases in simple natural language, on-demand availability of 2000+ real test devices (Android, iOS, Browsers), parallel automated testing for large test suites, recorders for identifying UI identifiers, comprehensive test reports, etc.

Testing 52

Testing Performance Testing Mobile Software 52

Testsigma

NOVEMBER 16, 2021

Even my data is synced over to different platforms quickly which means I am working on the same database for each of my applications. This is an online tool that can automate cross-browser tests on 2000+ browser combinations. For example, I can log in to the website and app with the same credentials without creating a new account.

Testing 52

Testing Website Small Business Internet 52

Alex Russell

JUNE 20, 2020

built-in relational SQL database engines. Consider the set of features the circa-2000 web could handle: Starting from a text-only document format in 1990, the web added features at a furious pace in the first decade, but not in a principled way. Other use-cases weren't addressable with early 2000's tech. high-color image raster.

Hardware 55

Hardware Games Java Media 55

Alex Russell

APRIL 29, 2021

The data captured by MDN Browser Compatibility Data Respository and the caniuse database is often partial and sometimes incorrect. CSS color(). Wide gamut colour is important in creative applications. Chrome does not yet support this for CSS, but is under development for <canvas> and WebGL.

Media 145

Media Games Education Engineering 145