Percona

JULY 19, 2023

Once inside, login to the PostgreSQL database (that’s where PMM keeps some of the settings): psql -U pmm-managed Switch to vertical output for the sake of readability, analog to using G in MySQL at the end of the query or running mysql with -E key, but in PostgreSQL, it is a setting: pmm-managed=> x Expanded display is on.

Monitoring 98

Monitoring Entertainment Open Source Tuning 98

Percona

JANUARY 19, 2023

Some startups adopted MySQL in its early days such as Facebook, Uber, Pinterest, and many more, which are now big and successful companies that prove that MySQL can run on large databases and on heavily used sites. Some of them are: MySQL Cluster: MySQL NDB Cluster is an in-memory database clustering solution developed by Oracle for MySQL.

Open Source 111

Open Source Storage Database Big Data 111

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 246

Azure Monitoring Virtualization Metrics 246

Percona

MARCH 3, 2023

Check the database’s topology, whether one or more servers were replicating, if it was a Percona XtraDB Cluster , etc. The person who tried to run this in production did not do the following: Run some previous backups of the rows to delete. Check if the table had referential integrity, child tables. Check the size of the table.

Testing 124

Testing Database Servers Open Source 124

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 124

Cache Hardware Servers Benchmarking 124

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 64

Scalability Database Systems 64

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 139

Database Servers Engineering Testing 139

HammerDB

JULY 8, 2024

A frequently asked question with HammerDB is when a user is using the TPROC-C workload to test database failure and failover scenarios, by deliberately killing connections or shutting down the database during a workload and then restarting it. Is a TPROC-C workload valid if you have restarted the database?

Database 52

Database Benchmarking Virtualization C++ 52

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 71

Database Scalability C++ Systems 71

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 114

Cache Database Virtualization Servers 114

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 58

Testing C++ Virtualization Tuning 58

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 91

Traffic Engineering Speed Storage 91

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

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 98

Servers C++ Database Systems 98

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

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 70

Open Source C++ Servers Database 70

VoltDB

APRIL 2, 2024

A transaction is a bundling of one or more operations on database state into a single sequence. Databases that offer transactional semantics offer a clear way to start, stop, and cancel (or roll back) a set of operations (reads and writes) as a single logical meta-operation. ACID consistency is all about database rules.

Education 52

Education C++ Database 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 Servers Cache Software Engineering 40

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

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

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 58

Benchmarking C++ Virtualization Database 58

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

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++ 63

C++ Virtualization Database Benchmarking 63

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

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

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

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

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

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

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.

Games 64

Games Hardware Java Mobile 64

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

Highly Scalable

MARCH 10, 2015

VL02] The True Lift Model – A Novel Data Mining Approach to Response Modeling in Database Marketing, V. [RR10] Recommender Systems Handbook, F. Shapira, P. Kantor, 2010. RU00] Data Mining Cookbook: Modeling Data for Marketing, Risk and Customer Relationship Management, O. Karypis, J. Konstan, J. Talluri, G. van Ryzin, 2005. Zapf, 2007.

Retail 152

Retail C++ Analytics Metrics 152

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 216

Code Metrics Efficiency Open Source 216

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

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 117

Storage Database Media Open Source 117

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