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Percona Toolkit – A Quick Introduction to Summary

Percona

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. Caches | 12.4G And did I mention they are open source?! LTS (jammy) Kernel | 6.2.0-33-generic

Cache 101
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How Many Warehouses for the HammerDB TPC-C Test?

HammerDB

The official TPC-C test has a fixed number of users per warehouse and uses keying and thinking time so that the workload generated by each user is not intensive. Also depending on your chosen database some database software will not scale to fully utilise all cores, see the best practice guides for guidance on your chosen database.

C++ 40
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ChatGPT Won’t Replace MySQL DBA – An Example of a Question About Encryption at Rest

Percona

I asked ChatGPT the question: “C an we backup and then remove the keyring file used for encryption at rest plugin after MySQL starts? ” 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

Database 119
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High Memory Usage on ProxySQL Server

Percona

ProxySQL is a very useful tool for gaining high availability, load balancing, query routing, query caching, query rewriting, multiplexing, and data masking. Proxysql has a stats database which we can see with an admin login. This database contains metrics gathered by ProxySQL concerning its internal functioning. Explanation.

Servers 60
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How to Install or Upgrade Percona Server for MySQL/MySQL 8 to a Specific Version on Debian/Ubuntu

Percona

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. Type 'c' to clear the current input statement. deb (Reading database. bullseye_amd64.deb.

Servers 85
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SQL Server I/O Basics Chapter #2

SQL Server According to Bob

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? KB boundary   12 Larger transaction logs   13 Restore and attach   14 Format for 4 ?KB

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SQL Server On Linux: Forced Unit Access (Fua) Internals

SQL Server According to Bob

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.

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